Quelet,R.; D'Angelo,J., Bulletin de la Societe Chimique de France, 1967, p. 1503 - 1511
作者:Quelet,R.、D'Angelo,J.
DOI:——
日期:——
Louw, J. van der; Baan, J. L. van der; Timmerman, P., Recueil des Travaux Chimiques des Pays-Bas, 1990, vol. 109, # 1, p. 29 - 30
作者:Louw, J. van der、Baan, J. L. van der、Timmerman, P.、Kanter, F. J. J. de、Bickelhaupt, F.、Klumpp, G. W.
DOI:——
日期:——
Realization of Complete Regiochemical Control during the Conversion of Squarate Esters into Complex Linear and Angular Polyquinanes. The Consequences of Incorporating a Leaving Group into One of the Alkenyllithium Reactants
作者:Leo A. Paquette、Julien Doyon
DOI:10.1021/jo962181m
日期:1997.3.1
A useful method is presented for controlling whether linear or angular triquinanes are formed during a reaction cascade initiated by the 2-fold addition of alkenyl anions to diisopropyl squarate, The key feature of the process involves the incorporation of a leaving group into one of the original nucleophilic reagents. Placement of the nucleofuge within a cyclic anion leads ultimately to formation of a linear product. Extracyclic and intracyclic options are possible, with preference given to the better leaving group when a competitive situation exists, When the leaving group is incorporated into an acyclic component, angular triquinanes result instead. Several other aspects of this impressive scaffolding scheme are detailed.
LOUW, J. VAN DER;BAAN, J. L. VAN DER;TIMMERMAN, P.;KANTER, F. J. J. DE;BI+, REC. TRAV. CHIM. PAYS-BAS. , 109,(1990) N, C. 29-30
作者:LOUW, J. VAN DER、BAAN, J. L. VAN DER、TIMMERMAN, P.、KANTER, F. J. J. DE、BI+