Reagent design and study of allene as a promising class of reagents (synthons) for cycloaddition. The site-selective and regioselective Diels-Alder reactions of (phenylsulfonyl)propadiene and alkylation of the adducts
作者:Kenji Hayakawa、Hitoshi Nishiyama、Ken Kanematsu
DOI:10.1021/jo00204a018
日期:1985.2
Rhodium catalyzed hydroformylation of 2-phenylsulfonylbicyclo[2.2.1] alkenes: effect of the phenylsulfonyl group
The preliminary results of the hydroformylation of 2-phenylsulfonyl substituted norbornene and norbornadiene derivatives catalyzed by the unmodified Rh(CO)(2)acac system are presented. The reaction, occurring under standard oxo conditions, gives polyfunctionalized exo norbornene- and exo norbornanecarboxaldehydes. The effect of the phenylsulfonyl group has been evaluated: it has been found that the steric properties of the sulfonyl substituent, more than the electronic ones, influence the regioselectivity of the process. (c) 2006 Elsevier Ltd. All rights reserved.