Sequential Morita–Baylis–Hillman/Achmatowicz reactions: an expeditious access to pyran-3(6H)-ones with a unique substitution pattern
摘要:
We herein disclosed a novel approach to synthesize densely functionalized 6-hydroxy-2H-pyran-3(6H)-ones with moderate to good diastereoselectivity. The method is based on a two step sequence using Morita-Baylis-Hillman adducts as substrates for the Achmatowicz rearrangement, allowing the preparation of highly substituted pyran-3-ones with overall yields ranging from 17% to 80% and a unique substitution pattern. (C) 2015 Elsevier Ltd. All rights reserved.
Drewes, S. E.; Emslie, N. D.; Khan, A. A., Synthetic Communications, 1989, vol. 19, # 5and6, p. 959 - 964
作者:Drewes, S. E.、Emslie, N. D.、Khan, A. A.、Roos, G. H. P.
DOI:——
日期:——
DREWES, S. E.;EMSLIE, N. D.;KHAN, A. A.;ROOS, G. H. P., SYNTH. COMMUN., 19,(1989) N-6, C. 959-964
作者:DREWES, S. E.、EMSLIE, N. D.、KHAN, A. A.、ROOS, G. H. P.
DOI:——
日期:——
Sequential Morita–Baylis–Hillman/Achmatowicz reactions: an expeditious access to pyran-3(6H)-ones with a unique substitution pattern
作者:Bruno B. Guidotti、Fernando Coelho
DOI:10.1016/j.tetlet.2015.09.120
日期:2015.11
We herein disclosed a novel approach to synthesize densely functionalized 6-hydroxy-2H-pyran-3(6H)-ones with moderate to good diastereoselectivity. The method is based on a two step sequence using Morita-Baylis-Hillman adducts as substrates for the Achmatowicz rearrangement, allowing the preparation of highly substituted pyran-3-ones with overall yields ranging from 17% to 80% and a unique substitution pattern. (C) 2015 Elsevier Ltd. All rights reserved.
An Improved Protocol for the Morita‐Baylis‐Hillman Reaction Allows Unprecedented Broad Synthetic Scope
作者:Nilton S. Camilo、Hugo Santos、Lucas A. Zeoly、Fábio S. Fernandes、Manoel T. Rodrigues、Thiago S. Silva、Samia R. Lima、José Cláudio Serafim、Aline S. B. de Oliveira、Arthur G. Carpanez、Giovanni W. Amarante、Fernando Coelho
DOI:10.1002/ejoc.202101448
日期:2022.3.7
By the combination of DABCO and aceticacid under solvent-free conditions, the Morita-Baylis-Hillman reaction rate of both activated and non-activated aldehydes increased significantly. The disclosed procedure is operationally simple and is compatible with a wide array of both nucleophilic and electrophilic reaction partners.