作者:Yuri Goldberg、Edgars Ābele、Gunārs Bremanis、Pēteris Trapenciers、Alexander Gaukhman、Juris Popelis、Artur Gomtsyan、Ivars Kalviņš、Mariya Shymanska、Edmunds Lukevics
DOI:10.1016/s0040-4020(01)89759-3
日期:1990.1
Betaines derived from α-, β- and γ-amino acids (obtained by alkylation of the corresponding amino acids with O-methyl-N.N'- diisopropylisourea) as well as β-hydrazino acids (prepared by de- hydrohalogenative hydrolysis of methyl 3-(2-a1ky1-2,2-dimethy1hydrazinium) propionate halides catalyse typical phase transfer reactions (dichlorocyclopropanation of styrene, N-formylation of pyrrolidine, dehydration
衍生自α-,β-和γ-氨基酸的甜菜碱(通过用O-甲基-N.N'-二异丙基异脲烷基化相应的氨基酸获得)以及β-肼基酸(通过甲基的脱卤化氢水解制得) 3-(2-a1ky1-2,2-dimethy1hydrazinium)丙酸酯卤化物催化典型的相转移反应(苯乙烯的二氯环丙烷化,吡咯烷的N-甲酰化,苯甲酰胺和苯乙酰胺的脱水,Williamson合成苄基丙基醚,将乙氧基羰基氮烯加成2) 3-二甲基丁烯-2。在大多数情况下,两性离子盐的活性至少类似于典型的相转移催化剂(四烷基铵盐)的活性,提出了甜菜碱1s的催化作用机理。