Synthesis 2019; 51(12): 2515-2522
DOI: 10.1055/s-0037-1611807
special topic
© Georg Thieme Verlag Stuttgart · New York

Ruthenium-Catalyzed Directed C(3)–H Olefination of N-Acetyl-1,2-dihydroisoquinolines: A Method to Achieve C3-Olefinated Isoquinolines

Riki Das
,
Nandkishor Prakash Khot
,
Akanksha Santosh Deshpande
,
SERB-India (EMR/2016/004298/OC) and CSIR-India [02(205)/14/EMR-II] are gratefully acknowledged for the research funding.
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Publication History

Received: 15 February 2019

Accepted after revision: 02 April 2019

Publication Date:
15 April 2019 (online)


§ Equal contribution

Published as part of the Special Topic Ruthenium in Organic Synthesis

Abstract

A unique approach to achieve regioselective C(3)–H olefination of isoquinolines under ruthenium-catalyzed conditions has been developed. The acetyl group of N-acetyl-1,2-dihydroisoquinoline acts as a directing group for this C–H olefination strategy. Removal of the acetyl directing group by a simple method leads to a quick access to C-3 olefinated isoquinolines. The methodology is a very good alternative to the traditional Heck reaction and substrates with halogen substituents are very good candidates for the transformation.

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