Studies towards the total synthesis of contignasterol
摘要:
The (17R,20S,22S,24S) C-20-C-29 segment of contignasterol has been stereoselectively prepared in 8 steps and 40% overall yield from (S)-carvone. Synthetic studies towards contignasterol's C/D ring functionalization/isomerization are also reported. (C) 2004 Elsevier Ltd. All rights reserved.
Studies towards the total synthesis of contignasterol
摘要:
The (17R,20S,22S,24S) C-20-C-29 segment of contignasterol has been stereoselectively prepared in 8 steps and 40% overall yield from (S)-carvone. Synthetic studies towards contignasterol's C/D ring functionalization/isomerization are also reported. (C) 2004 Elsevier Ltd. All rights reserved.
The total synthesis of (+)-ryanodol. Part II. Model studies for rings B and C of (+)-anhydroryanodol. Preparation of a key pentacyclic intermediate
作者:Pierre Deslongchamps、André Bélanger、Daniel J. F. Berney、Hans-Juerg Borschberg、Robert Brousseau、Alain Doutheau、Robert Durand、Hajime Katayama、Richard Lapalme、Dominique M. Leturc、Chun-Chen Liao、Frederick N. MacLachlan、Jean-Pierre Maffrand、Fabrizio Marazza、Robert Martino、Claude Moreau、Luc Ruest、Louiselle Saint-Laurent、Roger Saintonge、Pierre Soucy
DOI:10.1139/v90-022
日期:1990.1.1
This paper reports several model studies that were necessary for the rational conception of a simple four-step synthesis (6 + (S)-74 → 81a–b → 83 87 → 89) (Scheme 11) of the carbonate derivative 8...