The Formation of cis- and trans-Perhydrobenzofurans from 2-(2-Methoxycyclohexyl)ethanol Derivatives. Reactions Proceeding through Methoxyl Participation
Preparation of higher order cyano and “non-ate” allyl copper reagents from the reaction of allyl chlorides with a formal copper anion
作者:Douglas E. Stack、Walter R. Klein、Reuben D. Rieke
DOI:10.1016/s0040-4039(00)93380-x
日期:1993.5
through the low temperature reaction of allyl chlorides with a formal copper anion. The copper anion is generated via the low temperature reduction of Cu(I) complexes by two equivalents of lithium naphthalenide and then oxidatively adds to allyl chlorides with minimal homocoupling. These allyl organocopper reagents undergo substitution reactions with alkyl chlorides and epoxides as well as 1,4-conjugate
Stereocontrolled oxidation of 5-hydroxyalkenes with rhenium oxide. III
作者:Suhan Tang、Robert M. Kennedy
DOI:10.1016/s0040-4039(00)79077-0
日期:1992.9
5-Hydroxyalkenes react with rhenium (VII) oxide (Re2O7) to provide 2-hydroxymethyl-tetrahydrofurans. Oxidation occurs with overall syn addition to the alkene. Stereoselectivity is easily understood by invoking [2+2] cycloaddition followed by reductive elimination.
5-羟基烯烃与氧化((Re 2 O 7)反应,生成2-羟甲基-四氢呋喃。氧化与烯烃的全部合成物加成一起发生。通过调用[2 + 2]环加成,然后进行还原性消除,可以轻松理解立体选择性。
Ligand exchange between cyanocuprates and allylic stannanes: a novel, direct route to allylic cuprates possessing remarkable reactivity and stability
作者:Bruce H. Lipshutz、Robert Crow、Stuart H. Dimock、Edmund L. Ellsworth、Robin A. J. Smith、James R. Behling
DOI:10.1021/ja00166a067
日期:1990.5
Generation of allylic manganates from trimethylmanganate and allylic stannanes and their reactions with epoxides
A new method for forming allyldimethylmanganate has been developed. The preparation eliminated the need for prior generation of an allylmetal species such as allyllithium or allylmagnesium compounds. The reagents reacted with epoxides to give allylated products exclusively in good yields. (C) 1997 Elsevier Science Ltd.