Palladium-Catalysed Synthesis of Alkenyldiphenyl- and Alkenylbenzylphenylphosphine Oxides
作者:Yuanyao Xu、Jiazhi Xia、Huiju Guo
DOI:10.1055/s-1986-31753
日期:——
Alkenyldiphenyl-and Alkenylbenzylphenyl phosphine oxides 3 were prepared by the palladium catalysed reaction of alkenyl bromides 1 with phosphine oxides 2a or 2b.
The regioselectivity of nitrone cycloadditions to vinyl phosphorus compounds
作者:Alberto Brandi、Stefano Cicchi、Andrea Goti、K. Michal Pietrusiewicz、Witold Wisniewski
DOI:10.1016/s0040-4020(01)87893-5
日期:1990.1
The 13-dipolar cycloadditions of nitrones 1-5 to diphenylvinylphosphine oxide (6) sulfide (7) and selenide (8) were carried out. The cycloadditions of the nitrone 3 as a model to substituted vinylphosphorus derivatives 28-36 were also carried out with satisfactory results with the exception of the sulfoxide 33. NuclearMagneticResonance spectroscopy (31p 1H and 13C) allowed the complete unambiguous
进行了1-5的硝酮与二苯基乙烯基氧化膦(6)硫化物(7)和硒化物(8)的13-偶极环加成。除了亚砜33以外,还进行了将硝酮3作为模型与取代的乙烯基磷衍生物28-36的环加成反应,结果令人满意。核磁共振波谱(31 p 1 H和13C)可以对所有产品进行完全明确的区域化学鉴定和分配,以及它们的相对定量测定。基于1 H和13 C NMR数据,也将异恶唑烷立体中心的相对立体化学分配给化合物9-23和37-46。
Some synthetic applications of vinylphosphane oxides
作者:Ana M. Gonzalez-Nogal、Purificacion Cuadrado、Maria A. Sarmentero
DOI:10.1016/j.tet.2010.10.016
日期:2010.12
Vinylphosphane oxides have been used as Michael acceptors for the diastereoselective synthesis of anti alpha-functionalized-beta-silylated phosphane oxides and beta-stannyl-, beta-phenylthio- or beta-phosphanyl phosphane oxides. Although the utility of these substrates as dipolarophiles was more limited, we have obtained a mixture of 3- and 4-phosphanylpyrazoles in which the latter is the major regioisomer, by 1,3-cycloaddition with N-phenylsydnone. Moreover, vinylphosphane oxides reacted with aldehydes in the presence of LDA by a Baylis-Hillman type reaction, leading to (E)-beta-hydroxyphosphane oxides, which were readily converted in allenes. It is noteworthy that the application of this methodology to silylated substrates has permitted us to synthesize an interesting and more versatile silylallene. (C) 2010 Elsevier Ltd. All rights reserved.
XU YUANYAO; XIA JIAZHI; GUO HUIJU, SYNTHESIS,(1986) N 8, 691-692