An efficient strategy for the synthesis of syn 1,3-diols via iterative acetate aldol reactions and synthesis of atorvastatin lactone
摘要:
An efficient strategy for the synthesis of syn 1,3-diol has been developed, employing an imidazolidinone based chiral auxiliary via stereoselective and sequential double acetate aldol reactions. The syn 1,3-diol subunit was modified to obtain the C-7 carboxylic acid side chain and further subjected to reaction with a suitable 1,4-diketone under Paal-Knorr conditions to obtain atorvastatin lactone. (C) 2015 Elsevier Ltd. All rights reserved.
An efficient strategy for the synthesis of syn 1,3-diols via iterative acetate aldol reactions and synthesis of atorvastatin lactone
摘要:
An efficient strategy for the synthesis of syn 1,3-diol has been developed, employing an imidazolidinone based chiral auxiliary via stereoselective and sequential double acetate aldol reactions. The syn 1,3-diol subunit was modified to obtain the C-7 carboxylic acid side chain and further subjected to reaction with a suitable 1,4-diketone under Paal-Knorr conditions to obtain atorvastatin lactone. (C) 2015 Elsevier Ltd. All rights reserved.
Tetrahydropyran Synthesis by Intramolecular Conjugate Addition to Enones: Synthesis of the Clavosolide Tetrahydropyran Ring
作者:Roderick Bates、Ping Song
DOI:10.1055/s-0030-1257890
日期:2010.9
The synthesis of a tetrahydropyran intermediate for clavosolide A is reported, employing a combination of cross-metathesis and intramolecular oxa-Michael addition. The intramolecular oxa-Michael addition to α,β-unsaturated esters requires the use of strong bases and can result in either modest yields or stereoisomeric mixtures, and can be highly variable according to the substrate structure. In contrast