A new, practical route to enoxysilanes is described from simple enolizable aldehydes or ketones, using the trimethylchlorosilane-sodium iodide—tertiary amine reagent in acetonitrile. From certain aldehydes, an onium intermediate has been isolated. A conformational study of this onium intermediate and a thermal unimolecular syn-elimination process may explain the stereoselectivity of the reaction. Such
Unusual cycloaddition behavior of 2-substituted norbornadienes with triazolinediones
作者:Waldemar Adam、Luis A. Arias、Ottorino De Lucchi
DOI:10.1016/s0040-4039(00)86841-0
日期:——
2-Chloronorbornadiene affords with 4-phenyltriazolinedione the homocycloadduct (1a) regioselectively as major product, along with small yields of the (2+2)-cycloadduct (2a), the dipolar rearrangement product (3a), and the ring insertion product (4a), while 2-trimethylsilyloxynorbornadiene leads to the ene-product (7c).
Stereospecific synthesis of metalated alkoxymethyl vinyl ethers
作者:Glenn J. McGarvey、Joginder S. Bajwa
DOI:10.1021/jo00195a053
日期:1984.10
Reactivity of the alkene component in the ruthenium-catalyzed [2+2] cycloaddition between an alkene and an alkyne: Part 2
作者:Robert W Jordan、William Tam
DOI:10.1016/s0040-4039(02)01191-7
日期:2002.8
Ruthenium-catalyzed [2+2] cycloadditions of 2,3-disubstituted norbornadienes and 2-substituted norbornadienes with an alkyne were found to be highly chemo- and stereoselective with moderate level of regioselectivities and only small rate differences were observed with different substituents on the norbornadiene. (C) 2002 Elsevier Science Ltd. All rights reserved.
Ragauskas, Arthur J.; Stothers, J.B., Canadian Journal of Chemistry, 1983, vol. 61, p. 2254 - 2256