HRID7220

反应详情

EQUATION

反应方程式

HRID 7220 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

1

PROCEDURE

实验过程

The crude (3R,5R)-7-[2-(4-fluorophenyl)-5-isopropyl-3-phenyl-4-phenylcarbamoyl-pyrrol-1-yl]-3,5-dihydroxy-heptanoic acid, t-butyl ester (VI-A) was converted to the acid using an excess of KOH/MeOH/Water, followed by lactonization in toluene with catalytic HCl. Chiral HPLC analysis (ChiralCel OF; 1 ml/min; 60° C.; 254 nm; 20% IPA:Hexanes) tR(3R,5R)=26.97 min./tR(3S,5S)=33.8 min. tR(3R,5S)=38.1 min./tR(3S,5R)=61.0 min.) indicated an enantiomeric excess of the syn isomer of 85%, favoring the (R,R) configuration.

WORKUP

后处理

  1. customtR(3R,5R)=26.97 min.
  2. customtR(3S,5S)=33.8 min.
  3. customtR(3R,5S)=38.1 min.
  4. customtR(3S,5R)=61.0 min.