Conjugate additions of E-alkenylphosphonates to lithiated Schöllkopf's bislactim ether: Stereocontrolled access to anti 2-amino-3-substituted-4-phosphonobutanoic acids
作者:Vicente Ojea、Ma Carmen Fernández、María Ruiz、JoséMa Quintela
DOI:10.1016/0040-4039(96)01230-0
日期:1996.8
Highly face-selective Michael addition of lithiated Schöllkopf's bislactim ether (derived from cyclo-[L-val-glyl] 7) to E-alkenylphosphonates 2a-d and 1,3-butadienylphosphonate 2e allows a direct and stereocontrolled access to the excitatory amino acid analogues 2,3-anti-2-amino-3-substituted-4-phosphonobutanoic acids 14a-d and 2-amino-6-phosphono-4-hexenoic acid 15. The relative stereochemistry was
高度面选择性迈克尔加成锂化Schöllkopf的bislactim醚(衍生自的环- [L-VAL-glyl] 7)至Ë -alkenylphosphonates图2a-d和1,3- butadienylphosphonate 2E允许对兴奋性氨基酸的直接和立体控制访问类似物2,3-抗-2-氨基-3-取代-4-膦酰基丁酸14a-d和2-氨基-6-膦酰基-4-己酸15。从环衍生物16、17和19的NMR研究确定了相对立体化学。