A convenient synthesis of protected (R)-α-phenylproline derivatives using the Mitsunobu reaction
作者:J. Van Betsbrugge、D. Tourwé、B. Kaptein、H. Kierkels、R. Broxterman
DOI:10.1016/s0040-4020(97)00521-8
日期:1997.7
hydrolysis, the resulting α-allylphenylglycine ethyl ester was enzymatically resolved using PLE. Hydroboration and oxidation of the double bond, Boc-protection and subsequent ring closure using the Mitsunobu reaction protocol gave rise to Boc-(R)-α-phenylproline ethyl ester.
从外消旋苯基甘氨酸开始以高收率制备Boc-(R)-α-苯基脯氨酸乙酯。苯基甘氨酸的缩合乙酯与苯甲醛布置ñ -亚苄基苯基甘氨酸乙酯,将其相转移催化的条件下烯丙基化。酸性水解后,将所得的α-烯丙基苯基甘氨酸乙酯用PLE酶解。硼氢化和双键的氧化,Boc保护和随后使用Mitsunobu反应方案进行的闭环反应产生了Boc-(R)-α-苯基脯氨酸乙酯。