Preparation of 2-(2-2-dimethyl-3-buten-1-yl)-2-oxaxolines
    31.
    发明授权
    Preparation of 2-(2-2-dimethyl-3-buten-1-yl)-2-oxaxolines 失效
    2-(2-2-二甲基-3-丁烯-1-基)-2-恶唑啉的制备

    公开(公告)号:US4426529A

    公开(公告)日:1984-01-17

    申请号:US342276

    申请日:1982-01-25

    CPC分类号: C07D263/04 C07D263/12

    摘要: A process comprising reacting a 2-methyloxazoline with a 3-methyl-2-buten-1-yl derivative of the formula ##STR1## in which X is halide, sulphonate or phosphate thereby to produce a 2-methyl-3-(3-methyl-2-butenyl)-2-oxazolinium salt of the formula ##STR2## reacting the oxazolinium salt with an alcoholate of the formulaR.sup.5 --O--M (V)in which M is one equivalent of an alkali metal or alkaline earth metal cation, to produce an oxazolidine of the formula ##STR3## pyrolyzing the oxazolidine to produce a 2-methyl-3-(3-methyl-2-butenyl)-oxazolindine of the formula ##STR4## and heating the 2-methylene-3-(3-methyl-2-butenyl)-oxazolidine to produce a 2-(2,2-dimethyl-3-buten-1-yl)-2-oxazoline.

    摘要翻译: 一种方法,包括使2-甲基恶唑啉与式(VII)的3-甲基-2-丁烯-1-基衍生物反应,其中X为卤化物,磺酸盐或磷酸盐,从而产生2-甲基-3- (Ⅳ)的(3-甲基-2-丁烯基)-2-恶唑啉盐(Ⅳ)使恶唑啉盐与式为R5-OM(Ⅴ)的醇化物反应,其中M为1当量的碱金属或 碱土金属阳离子,以产生式(III)的恶唑烷,式(III)热解恶唑烷以产生式“IMAGE”的2-甲基-3-(3-甲基-2-丁烯基) - 恶唑啉并加热 2-亚甲基-3-(3-甲基-2-丁烯基) - 恶唑烷,得到2-(2,2-二甲基-3-丁烯-1-基)-2-恶唑啉。

    Preparation of nitriles from formamides
    32.
    发明授权
    Preparation of nitriles from formamides 失效
    从甲酰胺制备腈

    公开(公告)号:US4419297A

    公开(公告)日:1983-12-06

    申请号:US340902

    申请日:1982-01-20

    CPC分类号: C07C253/20

    摘要: Aliphatic, araliphatic or aromatic nitriles of the formula R--CN are obtained by reacting N-substituted formamides of the formula R--NHCHO with at least the stoichiometric quantity of an acylating agent (generally a carboxylic acid anhydride, such as acetic anhydride, or ketene) in the gas phase at temperatures above 250.degree. C., without using a catalyst. The process is especially useful in the preparation of nitriles wherein the connecting carbon of R is a tertiary carbon atom. The nitriles are important intermediate products, for example for the preparation of herbicides, surface-active agents and anti-corrosive agents.

    摘要翻译: 式R-CN的脂族,芳脂族或芳族腈通过使式R-NHCHO的N-取代甲酰胺与至少化学计量量的酰化剂(通常为羧酸酐,例如乙酸酐或乙烯酮)反应而获得 )在高于250℃的温度下在气相中,而不使用催化剂。 该方法在制备其中R的连接碳是叔碳原子的腈中是特别有用的。 腈是重要的中间产物,例如用于制备除草剂,表面活性剂和抗腐蚀剂。

    Process for the preparation of 1,1-dihalo-4-methyl-1,3-pentadiene
compounds
    33.
    发明授权
    Process for the preparation of 1,1-dihalo-4-methyl-1,3-pentadiene compounds 失效
    制备1,1-二卤代-4-甲基-1,3-戊二烯化合物的方法

    公开(公告)号:US4191712A

    公开(公告)日:1980-03-04

    申请号:US964216

    申请日:1978-11-27

    CPC分类号: C07C17/361

    摘要: Process for making 1,1-dihalo-4-methyl-1,3-pentadiene compounds which process comprises reacting a 2-2-dimethyl-3,5,5,5-tetrahelogenopent-1-yl derivative of the formula ##STR1## in which Hal.sup.1 is defined as above,Hal.sup.2 is halogen, andR is hydrogen or alkanoyl of up to 5 carbon atoms with a substance having a basic reaction in a temperature range from 20.degree. to 160.degree. C. Certain intermediates produced in such process can also be used as the initial starting material.

    摘要翻译: 制备1,1-二卤代-4-甲基-1,3-戊二烯化合物的方法包括使下式的图像形式的2-二甲基-3,5,5,5-四脱木酸-1-基衍生物: (I),其中Hal1如上所定义,Hal2是卤素,R是氢或具有至多5个碳原子的烷酰基,物质在20至160℃的温度范围内具有碱性反应。产生某些中间产物 在这种过程中也可以用作初始起始材料。

    Process for the production of autocrosslinkable polymers containing
n-alkoxymethyl groups
    36.
    发明授权
    Process for the production of autocrosslinkable polymers containing n-alkoxymethyl groups 失效
    制备含有正烷氧基甲基的自交联聚合物的方法

    公开(公告)号:US4064110A

    公开(公告)日:1977-12-20

    申请号:US665289

    申请日:1976-03-09

    摘要: Storable, autocrosslinkable polymers containing N-alkoxymethyl groups are obtained by reacting 5-alkoxymethyl-1,3,4-dioxazol-2-ones with a polymer having an average molecular weight above 600 and an average of more than one Zerewitinoff-active hydrogen atom in the molecule in the presence of a catalytic quantity of at least an alkali metal salt. The new catalysts allow to carry out the reaction at a temperature in the range from 50.degree. to 110.degree. C and guarantee a complete reaction of the reactants into uncrosslinked but autocrosslinkable light-stable end products.

    摘要翻译: 含有N-烷氧基甲基的可存储的自交联聚合物是通过使5-烷氧基甲基-1,3,4-二恶唑-2-酮与平均分子量高于600的聚合物和平均多于一个Zerewitinoff-活性氢原子 在分子中存在催化量的至少一种碱金属盐。 新的催化剂允许在50℃至110℃的温度下进行反应,并保证反应物完全反应成未交联但可自交联的光稳定的最终产物。

    Method for the production of ivermectin
    39.
    发明授权
    Method for the production of ivermectin 失效
    生产伊维菌素的方法

    公开(公告)号:US6072052A

    公开(公告)日:2000-06-06

    申请号:US297241

    申请日:1999-04-27

    IPC分类号: C07H17/08 C07H19/01

    CPC分类号: C07H17/08

    摘要: The present invention relates to a process for preparing ivermectin by selective hydrogenation of avermectin and subsequent removal of the catalyst.

    摘要翻译: PCT No.PCT / EP97 / 05777 一九九九年四月二十七日 102(e)日期1999年4月27日PCT 1997年10月20日PCT公布。 公开号WO98 / 18806 日期1998年5月7日本发明涉及通过阿维菌素的选择性氢化和随后除去催化剂来制备伊维菌素的方法。