PMR study of the three-dimensional structure of stereoisomeric adducts of cis-alloocimene with acrylonitrile and their cyclization products with dichlorocarbene
Ni(acac)(2) catalyzes homoallylation of aldehydes with 1,3-dienes in the presence of triethylborane. Triethylborane serves as a reducing agent delivering a formal hydride to the C2 position of 1,3-dienes, thus generating a formal homoallyl anion species and enabling the novelhomoallylation of aldehydes. The reaction proceeds smoothly at room temperature in the absence of any phosphane or nitrogen
Diels-Alder modification of monoterpenes and Alder-ene synthesis involving 3-methyl-3-cyanocyclopropene
作者:R. V. Ashirov、S. A. Appolonova、V. V. Plemenkov
DOI:10.1007/s10600-006-0174-7
日期:2006.7
Monoterpene derivatives with a cyclopropane moiety in the molecule were prepared by reactions of 3-methyl-3-cyanocyclopropene with several monoterpenes and terpenoids (β-myrcene, neoalloocimene, alloocimene, β-pinene, carvone). They were formed using the Diels-Alder reaction, Alder-ene synthesis, conjugated Alder-ene addition, and Diels-Alder cyclization.