Lithiation of 2-chloroglucal derivatives provides ready access to the corresponding 1-lithioglucals which undergo a variety of serve useful intermediates for further elaboration of the carbohydrate nucleus. Removal of the 2-chloro substituent may be affected using a Birch-type reduction. (c) 2006 Elsevier Ltd. All rights reserved.
Lithiation of 2-chloroglucal derivatives provides ready access to the corresponding 1-lithioglucals which undergo a variety of serve useful intermediates for further elaboration of the carbohydrate nucleus. Removal of the 2-chloro substituent may be affected using a Birch-type reduction. (c) 2006 Elsevier Ltd. All rights reserved.
Second generation benzannulation reactions: Sugar-derived Fischer chlorocarbene complexes in organic synthesis
作者:Michael.R. Hallett、James E. Painter、Peter Quayle、Dean Ricketts、Prakash Patel
DOI:10.1016/s0040-4039(98)00315-3
日期:1998.4
The facile metallation of 2-chloroglucal derivatives 8 and 11 affords ready access to the corresponding Fischer carbene complexes 10 and 13. Carbene complexes 10 and 13 undergo benzannulationreactions with acetylenes to provide functionalised benzopyrans in moderate overall yields.
作者:Ewan Boyd、Michael R. Hallett、Ray V.H. Jones、James E. Painter、Prakash Patel、Peter Quayle、Anita J. Waring (née Potts)
DOI:10.1016/j.tetlet.2006.09.087
日期:2006.11
Lithiation of 2-chloroglucal derivatives provides ready access to the corresponding 1-lithioglucals which undergo a variety of serve useful intermediates for further elaboration of the carbohydrate nucleus. Removal of the 2-chloro substituent may be affected using a Birch-type reduction. (c) 2006 Elsevier Ltd. All rights reserved.