119244-26-7Relevant academic research and scientific papers
Photoswitchable Chiral Phase Transfer Catalyst
Kondo, Masaru,Nakamura, Kento,Krishnan, Chandu G.,Takizawa, Shinobu,Abe, Tsukasa,Sasai, Hiroaki
, p. 1863 - 1867 (2021)
Azo-crown ether-based photoswitching chiral phase transfer catalysts have been developed to control the catalytic activity by photoirradiation. Azobenzene binaphthyl crown ether (ABCE) can switch its reactivity and selectivity through structural transform
Synthesis of new dimeric-PEG-supported cinchona ammonium salts as chiral phase transfer catalysts for the alkylation of Schiff bases with water as the solvent
Wang, Xin,Yin, Liang,Yang, Ting,Wang, Yongmei
, p. 108 - 114 (2007/10/03)
The water-soluble PEG-supported cinchona ammonium salts were successfully synthesized and used as chiral phase transfer catalysts for the asymmetric alkylation of tert-butyl benzophenone Schiff base derivatives with high chemical yields (up to 98%) and en
A new class of acetophenone-based cinchona alkaloids as phase-transfer catalysts: Application to the enantioselective synthesis of α-amino acids
Lv, Jian,Zhang, Liping,Liu, Lei,Wang, Yongmei
, p. 1354 - 1355 (2008/03/18)
A new class of acetophenone-based cinchona alkaloid-de-rived quaternary ammonium salts were prepared and evaluated as phase-transfer catalysts in the enantioselective alkylation of glycine imine ester. +R 3N-CH2COAr and el
Enantioselective reactions of tert-butyl glycinate-benzophenone Schiff base catalyzed by chiral phase-transfer catalyst in aqueous media without any organic solvent
Mase, Nobuyuki,Ohno, Takahiro,Morimoto, Hironao,Nitta, Fumito,Yoda, Hidemi,Takabe, Kunihiko
, p. 3213 - 3216 (2007/10/03)
Chiral phase-transfer catalyzed enantioselective alkylations of tert-butyl glycinate-benzophenone Schiff base were investigated in aqueous media without any organic solvent. Reactions in aqueous media smoothly proceeded to give the desired product in high
Asymmetric alkylation of glycine imine esters using solid supports preloaded with base
Yu, Haitao,Takigawa, Setsuko,Koshima, Hideko
, p. 8405 - 8410 (2007/10/03)
Investigations into the use of solid supports preloaded with base for the asymmetric alkylation of a benzophenone-derived glycine-imine was described. Residual traces of water on the support dramatically accelerated the reactions to complete within a few
A convenient method for asymmetric alkylation of glycine imine esters using solid supports
Yu, Haitao,Koshima, Hideko
, p. 9209 - 9212 (2007/10/03)
Asymmetric alkylation of butyl glycinate-benzophenone Schiff base proceeded smoothly on clays and alumina at room temperature to afford alkylated products in high yields and good enantioselectivities.
