Synthesis of Enantiomerically Pure α-Substituted Propargylic Amines by Reaction of Organoaluminum Reagents with Oxazolidines
摘要:
Various oxazolidines prepared in two steps from (R)-phenylglycinol react at 0 degrees C with dialkyl-alkynylalane-triethylamine complexes in the presence of trimethylaluminum in high yield and diastereoselectivity. Enantiomerically pure primary alpha-substituted propargylamines cah be easily obtained in two steps after removal of ferrocenylmethyl protective group under smooth acidic conditions and oxidative cleavage of the chiral appendage.
Synthesis of Enantiomerically Pure α-Substituted Propargylic Amines by Reaction of Organoaluminum Reagents with Oxazolidines
摘要:
Various oxazolidines prepared in two steps from (R)-phenylglycinol react at 0 degrees C with dialkyl-alkynylalane-triethylamine complexes in the presence of trimethylaluminum in high yield and diastereoselectivity. Enantiomerically pure primary alpha-substituted propargylamines cah be easily obtained in two steps after removal of ferrocenylmethyl protective group under smooth acidic conditions and oxidative cleavage of the chiral appendage.