Chiral relay effects influence the facial selectivity of N-alkylated 5-phenylmorpholin-2-one enolates
摘要:
Alkylation studies on the enolate of N-methyl morpholinone 7 clearly reveal that the observed cis-selectivity is consistent with a chiral relay system operating to invert the stereochemical information of the auxiliary's C-5 stereogenic centre. (C) 1998 Elsevier Science Ltd. All rights reserved.
Chiral relay effects influence the facial selectivity of N-alkylated 5-phenylmorpholin-2-one enolates
摘要:
Alkylation studies on the enolate of N-methyl morpholinone 7 clearly reveal that the observed cis-selectivity is consistent with a chiral relay system operating to invert the stereochemical information of the auxiliary's C-5 stereogenic centre. (C) 1998 Elsevier Science Ltd. All rights reserved.
L-α-Amino acids including L-α-arylglycines were conveniently and stereoselectively synthesized via the α-amino carbonitriles given by the Strecker reaction of (R)-2-amino-2-phenylethanol with aldehydes and hydrogen cyanide. The stereoselectivity of these α-amino carbonitriles was thermodynamically controlled.