Asymmetric synthesis and absolute stereochemistry of 4,4-bis-(trifluoromethyl)imidazoline based ACAT inhibitors
摘要:
An asymmetric synthesis of 1, a potent orally active ACAT inhibitor, is reported. The absolute configuration of 1 has been determined by exciton CD spectra and X-ray crystal structure analysis. (C) 1997 The DuPont Merck Pharmaceutical Company.
Asymmetric synthesis and absolute stereochemistry of 4,4-bis-(trifluoromethyl)imidazoline based ACAT inhibitors
作者:Hui-Yin Li、Indawati DeLucca、Spencer Drummond、George A. Boswell
DOI:10.1016/s0040-4020(97)00081-1
日期:1997.4
An asymmetric synthesis of 1, a potent orally active ACAT inhibitor, is reported. The absolute configuration of 1 has been determined by exciton CD spectra and X-ray crystal structure analysis. (C) 1997 The DuPont Merck Pharmaceutical Company.
An Unusual Trifluoromethyl Elimination Reaction from the 4,4-Bis(trifluoromethyl)-5-hydroxyimidazoline Ring System
作者:Hui-Yin Li、Indawati DeLucca、Spencer Drummond、George A. Boswell
DOI:10.1021/jo961723x
日期:1997.4.1
observed when 4,4-bis(trifluoromethyl)-5-hydroxyimidazoline 5 was treated with a variety of bases to afford the biologically interesting 4-(trifluoromethyl)imidazole analogs (9 and 10). A unique mechanism was proposed for this transformation, supported by isolating and trapping the hypothesized intermediates. Heating of 5 with Et(4)NCN in DMSO provided 19, which was clearly derived from the proposed