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公开(公告)号：US4822898A
公开(公告)日：1989-04-18
申请号：US906373
申请日：1986-09-12
申请人： Kazuo Kamaya , Yukihisa Takisawa
发明人： Kazuo Kamaya , Yukihisa Takisawa
IPC分类号： C07D307/62 , C07
CPC分类号： C07D307/62
摘要： An ascorbic acid or erythorbic acid derivative represented by the following general formula: ##STR1## wherein n represents an integer of 4 to 20; and a process for producing said ascorbic acid or erythorbic acid derivative which comprises heat-treating 2,5,6-triacyl-substituted-ascorbic acid or -erythorbic acid represented by the following general formula: ##STR2## wherein n represents an integer of 4 to 20, in the presence of water and/or a lower aliphatic alcohol at a temperature of 30.degree. C. to 100.degree. C. and thereby selectively eliminating only the acyl group of the 2-position.
摘要翻译： 由以下通式表示的抗坏血酸或异抗坏血酸衍生物：其中n表示4至20的整数; 以及生产所述抗坏血酸或异抗坏血酸衍生物的方法，其包括热处理由以下通式表示的2,5,6-三酰基取代的抗坏血酸或抗坏血酸：其中n表示4的整数 在20℃下，在30℃至100℃的温度下，在水和/或低级脂族醇的存在下，仅选择性地除去2-位的酰基。
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公开(公告)号：US4958033A
公开(公告)日：1990-09-18
申请号：US912220
申请日：1986-09-26
IPC分类号： B01J27/00 , B01J27/138 , C07B49/00 , C07B61/00 , C07C29/40 , C07C33/042 , C07C33/048 , C07C33/30 , C07C35/06 , C07D307/42 , C07D333/16
CPC分类号： C07D307/42 , C07C29/40 , C07C33/042 , C07C33/048 , C07C33/30 , C07C35/06 , C07D333/16 , C07C2101/08
摘要： A process for preparing an alcohol of the formula: ##STR1## by reacting a carbonyl compound of the formula: ##STR2## or an oxirane of the formula: ##STR3## magnesium and a propargyl halide of the formula: ##STR4## followed by hydrolysis, characterized in that the carbonyl compound (II) or the oxirane compound (III) and the propargyl halide (IV) are reacted simultaneously with magnesium in an inert solvent in the presence of zinc or a halide thereof.
摘要翻译： 通过使下式的羰基化合物（II）或下式的环氧乙烷（IMAGE）反应制备下式的醇的方法：（I）或图像（I） III）镁和下式的炔丙基卤化物（IV），然后水解，其特征在于羰基化合物（II）或环氧乙烷化合物（III）和炔丙基卤化物（IV）与镁同时反应 在锌或其卤化物存在下的惰性溶剂。
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公开(公告)号：US4398047A
公开(公告)日：1983-08-09
申请号：US351449
申请日：1982-02-23
摘要： 2-Substituted-4,6-di-t-butylresorcinol represented by the general formula: ##STR1## wherein R represents a straight or branched alkyl group having 1 to 20 carbon atoms, a straight or branched alkenyl group having 2 to 20 carbon atoms and at least one double bond, or an aralkyl group, wherein no tertiary carbon atom of R is directly bonded to the benzene nucleus, is prepared by allowing 4,6-di-t-butylresorcinol to react with a halogen compound represented by the general formula:RXwherein R has the same meaning as defined above, and X represents a halogen atom, excluding the X bonded to a tertiary carbon of R, in an aqueous alkali solution. By further debutylization of the 2-substituted-4,6-t-butylresorcinol, 2-substituted resorcinol represented by the general formula: ##STR2## wherein R has the same meaning as defined above, but the tertiary carbon of R is free from direct bonding to the benzene nucleus, is prepared.
摘要翻译： 由以下通式表示的2-取代的-4,6-二 - 叔丁基间苯二酚：其中R表示碳原子数1〜20的直链或支链烷基，碳原子数2〜20的直链或支链烯基 和至少一个双键或芳烷基，其中R的叔碳原子直接键合到苯核上，是通过使4,6-二叔丁基间苯二酚与由通式 式中，R表示与上述定义相同的含义，X表示卤素原子，除了在碱水溶液中与R的叔碳键合。 通过进一步丁基化2-取代-4,6-叔丁基间苯二酚，由以下通式表示的2-取代间苯二酚：其中R具有与上述相同的含义，但R的叔碳不含直接 与苯核键合，制备。
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公开(公告)号：US4398043A
公开(公告)日：1983-08-09
申请号：US324135
申请日：1981-11-23
IPC分类号： C07C45/59
CPC分类号： C07C45/59
摘要： A process for preparing cyclopentenolones of the formula: ##STR1## wherein R.sub.1 is a straight, branched or cyclic alkyl group having not more than 6 carbon atoms, a straight, branched or cyclic alkenyl group having not more than 6 carbon atoms, a straight or branched alkynyl group having not more than 6 carbon atoms or a group of the formula: ##STR2## wherein R.sub.2 is a hydrogen atom, a methyl group or a halogen atom directly from the corresponding furan-carbinols of the formula: ##STR3## wherein R.sub.1 is as defined above in a single step with an excellent yield, characterized in that the furan-carbinols are treated with water in the presence or absence of a catalyst.
摘要翻译： 一种制备下式的环戊烯酮的方法：其中R 1是不大于6个碳原子的直链，支链或环状烷基，直链或支链或环状碳原子数不多于6的烯基，直链或 具有不超过6个碳原子的支链炔基或下式的基团：其中R 2是直接来自下式的相应的呋喃 - 甲醇的氢原子，甲基或卤素原子：其中R 1 在单一步骤中具有优异的产率，其特征在于在存在或不存在催化剂的情况下用水处理呋喃 - 甲醇。
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公开(公告)号：US4352756A
公开(公告)日：1982-10-05
申请号：US248677
申请日：1981-03-30
IPC分类号： C07D307/42 , C07D307/44
CPC分类号： C07D307/42
摘要： In the production of a furfuryl alcohol of the formula: ##STR1## wherein R.sub.1 is a hydrogen atom or a methyl group and R.sub.2 is an allyl or .alpha.-methylallyl group, by combining the corresponding furfural of the formula: ##STR2## wherein R.sub.1 is as defined above, with magnesium and allyl chloride or .alpha.-methylallyl chloride into a reaction and hydrolysing the resultant product, the improved method wherein tetrahydrofuran or its mixture with at least one aromatic hydrocarbon is used as a reaction medium, and the furfural and allyl chloride or .alpha.-methylallyl chloride are simultaneously added to the reaction medium comprising magnesium, whereby the objective furfuryl alcohol is obtained in high yields.
摘要翻译： 在制备下式的糠醇时：其中R 1是氢原子或甲基，R 2是烯丙基或α-甲基烯丙基，通过组合下式的相应糠醛：其中R 1是 如上所述，用镁和烯丙基氯或α-甲基烯丙基氯反应并水解所得产物，其中使用四氢呋喃或其与至少一种芳族烃的混合物作为反应介质的改进方法，并且将糠醛和烯丙基氯 或α-甲基烯丙基氯同时加入到包含镁的反应介质中，从而以高产率获得目标糠醇。
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公开(公告)号：US4337370A
公开(公告)日：1982-06-29
申请号：US201746
申请日：1980-10-29
摘要： 2-Substituted-4,6-di-t-butylresorcinol represented by the general formula: ##STR1## wherein R represents a straight or branched alkyl group having 1 to 20 carbon atoms, a straight or branched alkenyl group having 2 to 20 carbon atoms and at least one double bond, or an aralkyl group, but the tertiary carbon atom of R is free from direct bonding to the benzene nucleus, is prepared by allowing 4,6-di-t-butylresorcinol to react with a halogen compound represented by the general formula:RXwherein R has the same meaning as defined above, and X represents a halogen atom, excluding the X bonded to the tertiary carbon of R, in an aqueous alkali solution. By further debutylization of the 2-substituted-4,6-t-butylresorcinol, 2-substituted resorcinol represented by the general formula: ##STR2## wherein R has the same meaning as defined above, but the tertiary carbon of R is free from direct bonding to the benzene nucleus, is prepared.
摘要翻译： 由以下通式表示的2-取代的-4,6-二 - 叔丁基间苯二酚：其中R表示碳原子数1〜20的直链或支链烷基，碳原子数2〜20的直链或支链烯基 和至少一个双键或芳烷基，但R的叔碳原子不与苯核直接结合，是通过使4,6-二叔丁基间苯二酚与由 通式为RX，其中R具有与上述相同的含义，X表示卤素原子，不包括与碱的叔碳键合的X在碱水溶液中。 通过进一步丁基化2-取代-4,6-叔丁基间苯二酚，由以下通式表示的2-取代间苯二酚：其中R具有与上述相同的含义，但R的叔碳不含直接 与苯核键合，制备。
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