通过重氮前体的光解在甲醇中生成具有不饱和邻位取代基(乙烯基氧基、1-丙烯氧基、烯丙基、2-丁烯基、2,4-戊二烯基)的芳基卡宾。发现分子间 OH 插入与双键的分子内加成竞争。与类似的分子间反应相比,三线态敏化强烈影响产物分布。根据 k S /k ST 和 k T /k TS 速率比对分子内过程的单线态和三线态成分进行剖析和评估。单线态芳基卡宾的分子内环加成反应效率很低,可能是由于需要围绕外环 C-CH: 键旋转。相比之下,相对于分子间类似物,三重芳基卡宾的非集中分子内加成强烈加速。最有可能的,
PROCESS FOR PREPARING 4-ISOPROPYLCYCLOHEXYLMETHANOL
申请人:Stecker Florian
公开号:US20110207968A1
公开(公告)日:2011-08-25
The present invention relates to a process for preparing 4-isopropylcyclohexylmethanol (IPCHM) from para-cymene. The process for preparing 4-isopropylcyclohexylmethanol (IPCHM) comprises an electrochemical process for preparing a mixture of 4-isopropylbenzaldehyde dimethyl acetal and 4-(1-alkoxy-1-methylethyl)benzaldehyde dimethyl acetal, and intermediates passed through in the process, a hydrolysis step to form the corresponding benzaldehydes and a hydrogenation of this mixture to form 4-isopropylcyclohexylmethanol (IPCHM).
ELECTROCHEMICAL METHOD FOR PRODUCING 3-TERT-BUTYLBENZALDEHYDE DIMETHYL ACETAL
申请人:Stecker Florian
公开号:US20120016162A1
公开(公告)日:2012-01-19
The present invention relates to 3-tert-butylbenzaldehyde dimethyl acetal and to 3-tert-butylbenzyl methyl ether and to an electrochemical method for producing 3-tert-butyl-benzaldehyde dimethyl acetal and intermediates passed through in said method.