✍ Scribed by Hassan Zali Boeini
No coin nor oath required. For personal study only.
Thieno[2,3‐b]indole derivatives were efficiently prepared via the reaction of 1,3‐dihydro‐2__H__‐indole‐2‐thiones with α‐bromo‐substituted ketones or aldehydes and in the presence of Et~3~N (Scheme 2 and Table). The reaction took place under very mild conditions and in short times with good to excellent yields.
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## Abstract A new series of 4‐(4‐methylpiperazin‐1‐yl)thieno[2,3‐__b__][1,5]benzoxazepines **1a‐k** has been synthesized from 4‐bromo‐2‐methylthiophene **6** or ethyl 2‐amino‐4,5‐dimethyl‐3‐thiophencarboxylate **10**. Preparation of the key intermediate thieno[2,3‐__b__][1,5]benzoxazepine‐4(5__H__)