The cdc25A protein phosphatase inhibitor dysidiolide (1) has been synthesized via intermolecular Diels-Alder reaction of the triene 4 with crotonaldehyde and construction of a quaternary carbon center by methylation of the exocyclic enolate. (C) 2000 Elsevier Science Ltd. All rights reserved.
The cdc25A protein phosphatase inhibitor dysidiolide (1) has been synthesized via intermolecular Diels-Alder reaction of the triene 4 with crotonaldehyde and construction of a quaternary carbon center by methylation of the exocyclic enolate. (C) 2000 Elsevier Science Ltd. All rights reserved.
Stereoselective Alkylation of Allylic Alcohols: Tandem Ethylation and Functionalization
作者:Pragna Pratic Das、Ivan L. Lysenko、Jin Kun Cha
DOI:10.1002/anie.201104331
日期:2011.9.26
A versatile formal SN2′ alkylation of allylic alcohols has been devised by means of the Kulinkovich reagent and in situ elaboration of the presumed alkyltitanium intermediates with electrophiles (see scheme). The utility of this method has been demonstrated in the stereoselective construction of all‐carbon quaternary centers.
Formal total syntheses of classic natural product target molecules via palladium-catalyzed enantioselective alkylation
作者:Yiyang Liu、Marc Liniger、Ryan M McFadden、Jenny L Roizen、Jacquie Malette、Corey M Reeves、Douglas C Behenna、Masaki Seto、Jimin Kim、Justin T Mohr、Scott C Virgil、Brian M Stoltz
DOI:10.3762/bjoc.10.261
日期:——
synthetic elaboration enables the formal totalsyntheses of a number of "classic" natural product target molecules. This publication highlights recent methods for setting quaternary and tetrasubstituted tertiary carbon stereocenters to address the synthetic hurdles encountered over many decades across multiple compound classes spanning carbohydrate derivatives, terpenes, and alkaloids. These enantioselective