Addition of Organometallic Compounds to Tin-Containing Cyclic Ketones. Remote Stereocontrol Induced by the Stannyl Group
作者:Asunción Barbero、Francisco J. Pulido、Juan A. Rincón
DOI:10.1021/ja036340c
日期:2003.10.1
(Z)-beta-Stannylvinyl ketones (Sn/CO separation: 5 bonds) react with organolithium reagents, showing a high degree of stereocontrol. On the contrary, the analogous ketones with E stereochemistry do not show selectivity at all. In the case of beta-stannyl ketones (Sn/CO separation: 3 bonds), the long distance between the tin center and the carbonyl group does not favor selective addition except when allyllithium
In situ cuprate formation via transmetalation between vinylstannanes and higher order cyanocuprates
作者:James R. Behling、Kevin A. Babiak、John S. Ng、Arthur L. Campbell、Robert. Moretti、Mike. Koerner、Bruce H. Lipshutz
DOI:10.1021/ja00216a045
日期:1988.4
Addition conjuguee de vinyl stannanes a des enones, par l'intermediaire d'une transmetallation avec le (cyano dimethyl) cuivre-dilithium. Cette methode est tres generale et a ete appliquee avec succes dans la synthese de prostaglandines
添加乙烯基锡烷和烯酮,par l'intermediaire d'une transmetallation avec le(氰基二甲基)cuivre-dilithium。Cette methode est tres generale et a ete appliquee avec succes dans la synthese de prostaglandines
Ring-formation from allyl- and vinylstannanes initiated by treatment with butyl-lithium
作者:Asuncion Barbero、Purificacion Cuadrado、Ana M. González、Francisco J. Pulido、Rosa Rubio、Ian Fleming
DOI:10.1016/0040-4039(92)89046-f
日期:1992.9
The allylstannane 1 and the vinylstannanes 3, 5 and 7 cyclise when treated with butyl-lithium.
的allylstannane 1和乙烯基锡烷3,5和7时用丁基锂处理过的环化。
The stannyl–cupration of acetylenes and the reaction of the intermediate cuprates with electrophiles as a synthesis of substituted vinylstannanes
作者:Asunción Barbero、Purificación Cuadrado、Ian Fleming、Ana M. González、Francisco J. Pulido
DOI:10.1039/c39920000351
日期:——
Stannyl–cupration of acetylenes followed by electrophilic attack with a variety of electrophiles gives vinylstannanes.
斯坦纳尔-乙炔的加成,然后用各种亲电试剂进行亲电攻击,得到乙烯基锡烷。
Remote Stereocontrol in Carbonyl Additions Promoted by Vinylstannanes
作者:Asunción Barbero、Francisco J. Pulido、Juan A. Rincón、Purificación Cuadrado、Diego Galisteo、Henar Martínez-García
syn to tin is the preferred mode of addition of organolithium reagents to the carbonyl group of cyclic ketones with a β-stannylvinyl group. This remarkable remote control is a consequence of the anchoring of the organolithium reagent by the tin and carbonyl groups.