摘要:
The invention provides a green process for direct oxidation of a large number of substituted or unsubstituted cinnamaldehydes or cinnamyl alcohols into the corresponding alkyl or aryl cinnamates in one step. The process of the present invention is a convenient and efficient green process for the preparation of various aryl or alkyl cinnamates under conventional, microwave and ultrasound directly from cinnamaldehydes or cinnamyl alcohols in the presence of an oxidizing agent, catalyst and an alcohol, with or without an organic solvent. These esters are immensely important compounds in flavor, perfumery and pharmaceutical industries. There are several prior arts available for the preparation of cinnamic esters, but all of them suffer from deficiencies such as use of expensive reagents and catalysts, harsh reaction conditions, use of toxic chemicals and others. In contrast, the present methodology is extremely simple and involves reaction of the substrate with an oxidizing agent mixed with a homogeneous or heterogeneous catalyst and an alcohol with or without organic solvent by stirring at room temperature or refluxing or under microwave or ultrasound irradiation to get the requisite products.
摘要:
The present invention relates to a single step, microwave induced process for the preparation of substituted stilbenes and its analogs. Particularly, provides a method for the preparation of commercially important 2- or 4-hydroxy substituted stilbenes in one pot utilizing cheaper substrates in the form of 2- or 4-hydroxy substituted arylaldehyde and/or phenylacetic acids as well as regents in the form of base such as collidine, triethylamine, pyridine, piperidine, sodium acetate, ammonium acetate, imidazole, methyl imidazoles and the like and/or acid such as formic acid, acetic acid, propionic acid and the like for a reaction time varying from 1 min-16 hrs depending upon microwave or conventional heating, without using decarboxylating agents with yield varying from 37-66% depending upon the base and/or acid, solvent and substrate used. It is important to mention that the presence of hydroxy substitution at 2- or 4-position of arylaldehyde and/or aryl acetic acid is essential requirements towards formation of stilbenes in one step.
摘要:
The invention entitled “A Microwave Induced One Pot Process for The Preparation of Arylethenes” provides a method for the preparation of commercially important 2- or 4-hydroxy substituted arylethenes like styrenes or stilbenes in one pot utilizing cheaper substrates in the form of 2- or 4-hydroxy substituted cinnamic acids and their derivatives as well as reagents in the form of base such as sodium hydroxide, potassium hydroxide, lithium hydroxide, sodium bicarbonate, sodium carbonate, potassium bicarbonate, potassium carbonate, ammonium acetate, imidazole, methylimidazole and the combination thereof, with or without solvent such as dimethylformamide, dimethylsulfoxide, ethylene glycol, diethylene glycol, acetonitrile, acetone, methyl imidazoles, ionic liquid, water and the like. The reaction time vary from 1 min-12 hrs and yield of the products from 49-76% depending upon the base, acid, substrate source of heating monomode or multimode microwave or conventional. It is important to mention that the presence of 2- or 4-hydroxy substitution at phenyl ring of cinnamic acids and their derivatives is essential requirements towards formation of corresponding arylethenes in one step.
摘要翻译:题为“A Microwave Induced One Pot Process for the Preparation of Arylehenes”的发明提供了一种在一个罐中制备商业上重要的2-或4-羟基取代的芳香醚如苯乙烯或二苯乙烯的方法,其使用2-或 4-羟基取代的肉桂酸及其衍生物以及碱的形式的试剂如氢氧化钠,氢氧化钾,氢氧化锂,碳酸氢钠,碳酸钠,碳酸氢钾,碳酸钾,乙酸铵,咪唑,甲基咪唑及其组合 有或没有溶剂如二甲基甲酰胺,二甲基亚砜,乙二醇,二甘醇,乙腈,丙酮,甲基咪唑,离子液体,水等。 反应时间从1分钟-12小时变化,产物的产率从49-76%变化,这取决于加热单模或多模微波或常规的碱,酸,底物来源。 重要的是提到在肉桂酸及其衍生物的苯环上存在2-或4-羟基取代是在一个步骤中形成相应的芳酰基的必要条件。
摘要:
The invention provides a green process for direct oxidation of a large number of substituted or unsubstituted cinnamaldehydes or cinnamyl alcohols into the corresponding alkyl or aryl cinnamates in one step. The process of the present invention is a convenient and efficient green process for the preparation of various aryl or alkyl cinnamates under conventional, microwave and ultrasound directly from cinnamaldehydes or cinnamyl alcohols in the presence of an oxidizing agent, catalyst and an alcohol, with or without an organic solvent. These esters are immensely important compounds in flavor, perfumery and pharmaceutical industries. There are several prior arts available for the preparation of cinnamic esters, but all of them suffer from deficiencies such as use of expensive reagents and catalysts, harsh reaction conditions, use of toxic chemicals and others. In contrast, the present methodology is extremely simple and involves reaction of the substrate with an oxidizing agent mixed with a homogeneous or heterogeneous catalyst and an alcohol with or without organic solvent by stirring at room temperature or refluxing or under microwave or ultrasound irradiation to get the requisite products.
摘要:
A drone docking system is disclosed that is connected to a drone. The drone docking system has a positioning member that connects to the drone and is configured to rotate the angle of the drone from a generally horizontal position to a generally vertical position. Connected to the positioning member is a charging member, which in one embodiment has a charging prong. The charging member is configured to connect to a power source, such as one located on existing infrastructure, e.g., a street light. A connection member is connected to the charging member. The connection member engages existing infrastructure to hold the drone in place. In one arrangement, the connection member has a pair of arcuate arms that receive, retain, and hold onto the existing infrastructure. In one example, the pair of arcuate arms are spring biased to apply a gripping pressure on the existing infrastructure.
摘要:
Described herein is a method and application platform system based on a block chain technology and created using blockchain technology and related software coding, programming languages, android technology, iOS technology, and/or azure cloud platform; the platform is incorporating multiple sub-platforms, such as BlockVOTE, BlockBOARD, BlockDRIVE, BlockAML, BlockLOAN, BlockPASSPORT and BlockVISA; and is supportive on any platforms/modes such as mobile phones, smart phones, tablets, computers, kiosks, digitals, screens, Virtual Reality supportive, Augmented Reality supportive and Mixed Reality; and incorporates block chain based encrypted digital verifications and transactions with Artificial Intelligence Instant Analytics. The platform can be accessible anytime, anywhere and by any user.
摘要:
A drone docking system is disclosed that is connected to a drone. The drone docking system has a positioning member that connects to the drone and is configured to rotate the angle of the drone from a generally horizontal position to a generally vertical position. Connected to the positioning member is a charging member, which in one embodiment has a charging prong. The charging member is configured to connect to a power source, such as one located on existing infrastructure, e.g., a street light. A connection member is connected to the charging member. The connection member engages existing infrastructure to hold the drone in place. In one arrangement, the connection member has a pair of arcuate arms that receive, retain, and hold onto the existing infrastructure. In one example, the pair of arcuate arms are spring biased to apply a gripping pressure on the existing infrastructure.
摘要:
The present invention relates to “a microwave induced process for the preparation of 4-vinylphenols or its derivatives” in which commercially important FEMA GRAS approved perfumery and flavouring vinylphenols (i.e. hydroxystyrenes) namely 4-vinylguaiacol (FEMA GRAS No. 2675) and 4-vinylphenol (FEMA GRAS No. 3739) as well as other useful vinylphenols such as 2,6-dimethoxy-4-vinylphenol, 2-hydroxy-4-vinylphenol, 3-hydroxy-4-vinylphenol etc. by condensation of malonic acid and 4-hydroxyphenylaldehydes or its derivatives.
摘要:
Described herein is a method and system providing complete global maritime mobility, operation and execution of any kind, anywhere, at any place by an authorised user, the system comprising live hologram projections “Digital Assets” of all on field “Physical Assets” including humans; and the system using Augmented Reality-Mixed Reality for creating live “Digital Twins” referred to as Hologram Projections of all available physical assets including humans in real world complete with monitoring, visualisation, communication, operations and execution capabilities; the system incorporating Data Infused Holograms with Artificial Intelligence Powered Descriptive, Predictive, Prescriptive and Cognitive (Fully Autonomous) Analytics and operative capabilities for Global Maritime World; each hologram of a physical asset having infinite data points as required.