Synlett 2022; 33(01): 66-69
DOI: 10.1055/a-1661-3378
letter

One-Pot Synthesis of 3-(1,2,3,4-Tetrahydroisoquinolin-1-yl)-isoquinolin-1(2H)-ones by DEAD-Promoted Oxidative Ugi–Wittig ­Reaction Starting from Phosphonium Salt Precursors

Long Zhao
,
Mao-Lin Yang
,
Mei Sun
,
Ming-Wu Ding
We gratefully acknowledge financial support of this work by the National Natural Science Foundation of China (21572075) and the 111 Project (B17019).


Abstract

A new one-pot synthesis of 3-(1,2,3,4-tetrahydroisoquinolin-1-yl)-isoquinolin-1(2H)-ones by DEAD-promoted oxidative Ugi–­Wittig reaction was developed. The sequential reactions of (2-carboxybenzyl)triphenylphosphonium salts, isocyanides, and N-aryl-1,2,3,4-tetrahydroisoquinolines produced 3-(1,2,3,4-tetrahydroisoquinolin-1-yl)-isoquinolin-1(2H)-ones in moderate to good overall yields in the presence of DEAD and Et3N.

Supporting Information



Publication History

Received: 08 September 2021

Accepted after revision: 04 October 2021

Accepted Manuscript online:
04 October 2021

Article published online:
27 October 2021

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