Synthesis of Highly Substituted Quinolines via a Tandem Ynamide Benzannulation/Iodocyclization Strategy
作者:Thomas P. Willumstad、Paul D. Boudreau、Rick L. Danheiser
DOI:10.1021/acs.joc.5b01648
日期:2015.12.4
A two-stage “tandem strategy” for the regiocontrolled synthesis of very highly substitutedquinolines is described. Benzannulation based on the reaction of cyclobutenones or diazo ketones with N-propargyl-substituted ynamides proceeds via a cascade of several pericyclic reactions to generate multiply substitutedaniline derivatives. In the second stage of the tandem strategy, triflate derivatives of
Batch and Flow Photochemical Benzannulations Based on the Reaction of Ynamides and Diazo Ketones. Application to the Synthesis of Polycyclic Aromatic and Heteroaromatic Compounds
作者:Thomas P. Willumstad、Olesya Haze、Xiao Yin Mak、Tin Yiu Lam、Yu-Pu Wang、Rick L. Danheiser
DOI:10.1021/jo402010b
日期:2013.11.15
compounds are produced via a two-stage tandem benzannulation/cyclization strategy. The initial benzannulation step proceeds via a pericyclic cascade mechanism triggered by thermal or photochemical Wolff rearrangement of a diazo ketone. The photochemical process can be performed using a continuous flow reactor which facilitates carrying out reactions on a large scale and minimizes the time required for