申请人:International Flavors & Fragrances Inc.
公开号:US04412083A1
公开(公告)日:1983-10-25
Described is a process for preparing solanone and norsolanadione using chemical intermediates defined according to the generic structure: ##STR1## wherein X is one of the moieties: ##STR2## wherein R represents hydrogen or methyl; wherein Y represents one of the structures: ##STR3## wherein one of the dashed lines represents a carbon-carbon single bond and the other of the dashed lines represents a carbon-carbon double bond; with the provisos that: (i) when Y is the moiety having the structure: ##STR4## then X is the moiety having the structure: ##STR5## (ii) when X is the moiety having the structure: ##STR6## then Y is the moiety having the structure: --C.tbd.N] In preparing solanone, the compound having the structure: ##STR7## or a mixture of compounds defined according to the structure: ##STR8## is reacted with methyl lithium and the resulting intermediate is hydrolyzed and the resulting compound is dehydrated. In producing the norsolanadione, the compound having the structure: ##STR9## or a mixture of compounds according to the structure: ##STR10## is reacted with ethylene glycol or propylene glycol thereby forming a ketal and the resulting ketal is reacted with methyl lithium and the resulting intermediate is then hydrolyzed in the presence of acid.
本文描述了一种制备溶酮和去氢溶酮酮的过程,使用根据通用结构定义的化学中间体:##STR1## 其中X是以下化合物之一:##STR2## 其中R代表氢或甲基;其中Y代表以下结构之一:##STR3## 其中虚线之一表示碳-碳单键,另一虚线表示碳-碳双键;并且有以下限制条件:(i)当Y是具有以下结构的化合物时:##STR4## 那么X是具有以下结构的化合物:##STR5## (ii)当X是具有以下结构的化合物时:##STR6## 那么Y是具有以下结构的化合物:--C.tbd.N] 制备溶酮时,具有以下结构的化合物:##STR7## 或根据以下结构定义的混合物:##STR8## 与甲基锂反应,生成的中间体经水解后脱水得到所需化合物。制备去氢溶酮酮时,具有以下结构的化合物:##STR9## 或根据以下结构定义的混合物:##STR10## 与乙二醇或丙二醇反应,形成一个酮缩物,然后将所得酮缩物与甲基锂反应,生成的中间体在酸的存在下水解。