Oxalate → HCID 70044869, compound

Participants

Reaction Steps

2-Acetoxy-3-[5-chloro -2-[3-(4-phenylpiperazin-1-yl) propyl]aminophenylthio]-3-(4-methoxyphenyl)propionic acid (VT b+VE b, threo/erythro=8.61/1) (2.006 g, 3.353 mmol) is subjected to a ring closure reaction in a similar manner to that described in Example 13 to obtain crude product (cis-VIb +trans-VIb) (1.941 g). This crude product is converted to its oxalate, which is recrystallized to obtain oxalate of (+)-cis-3-acetoxy-8-chloro-2,3-dihydro-2-(4-methoxyphenyl)-5-[3-phenylpiperazin-1-yl]propyl -1,5-benzothiazepine- 4(5H)-one (cis-VIb) (1. 298 g, yield=48.4%) as colorless prism-shaped crystals.

Provenance & Evidence