Reaction of Epoxides with Chlorocarbonylated Compounds Catalyzed by Hexaalkylguanidinium Chloride
摘要:
Silica-supported guanidinium chloride (PBGSiCl) exhibits efficient chemo- and regiospecific catalytic activity in the ring opening of epoxides with various electrophiles. This reaction allows the preparation of beta-chloro esters and beta-chloro chloroformates in high yield-under neutral conditions which offer product stability and ease of product isolation.
Process for the preparation of a compound with at least one five-membered cyclic monothiocarbonate group wherein a) a compound with at least one epoxy group is used as starting material b) the compound is reacted with phosgene or an alkyl chloroformate thus giving an adduct and c) the adduct is reacted with a compound comprising anionic sulfurthus obtaining the compound with at least one five-membered cyclic monothiocarbonate group.
制备含有至少一个五元环单硫代碳酸酯基团的化合物的工艺,其中 a) 使用含有至少一个环氧基团的化合物作为起始原料;b) 将该化合物与光气或氯甲酸烷基酯反应,从而得到加合物;c) 将该加合物与含有阴离子硫磺的化合物反应,得到含有至少一个五元环单硫代碳酸酯基团的化合物。
METHOD FOR THE PREPARATION OF THIOCARBONATES
申请人:BASF SE
公开号:EP3668851B1
公开(公告)日:2022-01-05
PROCESS FOR THE MANUFACTURING OF A POLYMER WITH URETHANE GROUPS
申请人:BASF SE
公开号:US20200239633A1
公开(公告)日:2020-07-30
Process for the manufacturing of a polymer with urethane groups, wherein in a first alternative a compound A) with at least two five-membered cyclic monothiocarbonate groups and a compound B) with at least two amino groups, selected from primary or secondary amino groups and optionally a compound C) with at least one functional group that reacts with a group —SH are reacted or wherein in a second alternative a compound A) with at least two five-membered cyclic monothiocarbonate groups or a mixture of a compound A) with a compound A1) with one five-membered cyclic monothiocarbonate group and a compound B) with at least two amino groups, selected from primary or secondary amino groups or a compound B1) with one amino group selected from primary or secondary amino groups or mixtures of compounds B) and B1) and a compound C) with at least two functional groups that react with a group —SH or in case of a carbon-carbon triple bond as functional group that react with a group —SH, a compound C) with at least one carbon-carbon triple bond. are reacted.
Reaction of Epoxides with Chlorocarbonylated Compounds Catalyzed by Hexaalkylguanidinium Chloride
作者:P. Gros、P. Le Perchec、J. P. Senet
DOI:10.1021/jo00096a040
日期:1994.8
Silica-supported guanidinium chloride (PBGSiCl) exhibits efficient chemo- and regiospecific catalytic activity in the ring opening of epoxides with various electrophiles. This reaction allows the preparation of beta-chloro esters and beta-chloro chloroformates in high yield-under neutral conditions which offer product stability and ease of product isolation.