P(RNCH2CH2)3N-catalyzed diastereoselective synthesis of oxazolines
摘要:
We report herein that the strong nonionic bases P(RNCH2CH2)(3)N(R=Mc, 1a; i-Pr, 1b) catalyze the diastereoselective synthesis of thirteen oxazolines in the presence of 5-30% of these catalysts. The formation of the oxazolines proceeds under very mild conditions in good to excellent yields with high dia stereo selectivity (> 95.5) for the trans isomer. (C) 2001 Elsevier Science Ltd. All rights reserved.