Highly Stereoselective Palladium(0)-Catalyzed Allylation of Active Methylene Compounds with Allyl Imidates under Neutral Conditions
作者:Osamu Suzuki、Seiichi Inoue、Kikumasa Sato
DOI:10.1246/bcsj.62.239
日期:1989.1
In the presence of a catalytic amount of Pd(0), active methylene compounds were allylated by allyl imidates under neutral conditions. In allylation with 3,3-disubstituted allyl imidates, e.g., geranyl and neryl imidate the effect of solvent and ligand to the E/Z ratio are investigated. The reaction in dimethyl sulfoxide by addition of diphosphine, e.g., 1,2-bis(diphenylphosphino)ethane, or large excess
Synthesis of Farnesol Isomers via a Modified Wittig Procedure
作者:José S. Yu、Troy S. Kleckley、David F. Wiemer
DOI:10.1021/ol0513239
日期:2005.10.1
variation on the use of beta-oxido ylides favored the (2Z)-stereoisomers, whereas the (2E)-isomers were obtained through a classical Horner-Wadsworth-Emmons condensation with triethylphosphonoacetate and reduction of the resulting ester.
Etude de la regioselectivite de la substitution des carbanions par des derives allyliques catalysee au palladium. Obtention selective de composes a carbone quaternaire
作者:Thérèse Cuvigny、Marc Julia、C. Rolando
DOI:10.1016/0022-328x(85)87384-8
日期:1985.4
carbanions and ligands on π-allylpalladium has been investigated in the substitution of primary or tertiary terpene derivatives. Conditions have been found under which the substitution takes place essentially at one or the other end of the allylic system. This provides a new and convenient way to obtain compounds with quaternary carbonatoms, which has been exemplified by the synthesis of 3,3-dimethyl-4-pentenenitrile
[EN] UNIQUE HALOGEN-INDUCED CYCLIZATIONS, REAGENTS THEREFOR, AND COMPOUNDS PRODUCED THEREBY<br/>[FR] CYCLISATIONS PARTICULIÈRES INDUITES PAR HALOGÈNE, RÉACTIFS POUR CELLES-CI ET COMPOSÉS AINSI PRODUITS
申请人:UNIV COLUMBIA
公开号:WO2012037069A3
公开(公告)日:2014-03-20
Synthetic Studies towards Stachybotrin C
作者:Srivari Chandrasekhar、Pierre van de Weghe、Naresh Tumma、Maiwenn Jacolot、Mickael Jean
DOI:10.1055/s-0032-1317528
日期:——
The preparation of racemic des-hydroxy stachybotrin C is described. Different approaches have been studied. Observations made in the course of the synthesis show the efficiency of the intermolecular cyclization between the diethyl acetal 19 and phenol 12 leading to the benzopyran moiety 17.