A short protocol for the synthesis of spirocyclic tetrahydrofurans via intramolecular O–H insertion
摘要:
The conversion of cyclic ketones to functionalised spirocyclic tetrahydrofurans via a three-step sequence of acetoacetate ester dianion-aldol reaction, diazo-transfer and carbene O-H insertion is described. (C) 2001 Elsevier Science Ltd. All rights reserved.
A short protocol for the synthesis of spirocyclic tetrahydrofurans via intramolecular O–H insertion
摘要:
The conversion of cyclic ketones to functionalised spirocyclic tetrahydrofurans via a three-step sequence of acetoacetate ester dianion-aldol reaction, diazo-transfer and carbene O-H insertion is described. (C) 2001 Elsevier Science Ltd. All rights reserved.
Synthesis of oxygen-containing heterocyclic compounds based on the intramolecular O–H insertion and Wolff rearrangement of α-diazocarbonyl compounds
作者:Mingyi Liao、Suwei Dong、Guisheng Deng、Jianbo Wang
DOI:10.1016/j.tetlet.2006.05.007
日期:2006.7
from β-keto α-diazo carbonylcompound to ketones or α,β-unsaturatedcompounds were subjected to Rh2(OAc)4-catalyzed and photo-induced diazo decomposition. The Rh2(OAc)4-catalyzed reaction afforded intramolecular O–H insertion products, while the photo-induced reaction gave Wolff rearrangement/intramolecular nucleophilic addition products. The transformations represent new approaches to tetrahydrofuran