Evaluation of the Efficiency of the Chiral Quaternary Ammonium Salt β-Np-NAS-Br in the Organic-Aqueous Phase-Transfer Alkylation of a Protected Glycine Derivative
作者:Takashi Ooi、Yukitaka Uematsu、Keiji Maruoka
DOI:10.1002/1615-4169(200206)344:3/4<288::aid-adsc288>3.0.co;2-8
日期:2002.6
allylation of glycine tert-butyl ester benzophenone Schiff base (1). This revealed the practical conditions for the asymmetric synthesis of both natural and unnatural α-amino acids, whose usefulness was demonstrated by the formal enantioselective synthesis of antibiotic L-azatyrosine.
N-螺环 C2-对称手性季铵盐 (S,S)-3 [(S,S)-β-Np-NAS-Br] 的固有效率已在具有代表性的有机-水液-液相中进行了评估-甘氨酸叔丁酯二苯甲酮席夫碱(1)的转移苄基化和烯丙基化。这揭示了天然和非天然 α-氨基酸不对称合成的实际条件,其有用性通过抗生素 L-氮杂酪氨酸的正式对映选择性合成得到证明。