Stereoselective synthesis of uncommon α,α′-dialkyl-α-aminoacids. Part 1
摘要:
The alkylation of the diastereomeric mixture of chiral morpholinone derivatives 4 and 5 occurs with good yield and trans induction. Cleavage of the alkylated products 6a,b,c,e gives enantiomerically pure uncommon land sterically constrained) alpha,alpha '-dialkyl-alpha-aminoacids. The absolute configuration of the new stereocentres of 4, 5, 6 and 7 has been assigned on the basis of the H-1-NMR spectra and NOE measurements. (C) 1998 Elsevier Science Ltd. All rights reserved.
Stereoselective synthesis of uncommon α,α′-dialkyl-α-aminoacids. Part 1
摘要:
The alkylation of the diastereomeric mixture of chiral morpholinone derivatives 4 and 5 occurs with good yield and trans induction. Cleavage of the alkylated products 6a,b,c,e gives enantiomerically pure uncommon land sterically constrained) alpha,alpha '-dialkyl-alpha-aminoacids. The absolute configuration of the new stereocentres of 4, 5, 6 and 7 has been assigned on the basis of the H-1-NMR spectra and NOE measurements. (C) 1998 Elsevier Science Ltd. All rights reserved.