Chemical behavior of cyclopropylmethyl radicals: relative unimportance of cyclopropylmethyl-to-3-butenyl rearrangement in cycloaddition reactions proceeding via allylically stabilized diradicals
KATAOKA FUMIO; NISHIDA SHINYA, CHEM. LETT., 1980, NO 9, 1115-1118
作者:KATAOKA FUMIO、 NISHIDA SHINYA
DOI:——
日期:——
Maercker Adalbert, Daub Volker E. E., Tetrahedron, 50 (1994) N 8, S 2439-2458
作者:Maercker Adalbert, Daub Volker E. E.
DOI:——
日期:——
Polylithiumorganic Compounds - 19.
作者:Adalbert Maercker、Volker E.E. Daub
DOI:10.1016/s0040-4020(01)86961-1
日期:1994.2
α-methylbenzylidenecyclopropane (32c) this rearrangement was shown to occur intermolecularly via a trilithiumorganic compound 56. The suggested mechanism of these reductive metalation reactions via a bisected radical anion 87 where the lithium is mainly bound to the cyclopropyl carbon atom and oriented syn to the phenyl ring, was supported by MNDO (geometries) and ab initio (energies) calculations.
DISTINCTIVE STRUCTURE-REACTIVITY SEQUENCES IN THE TYPE I AND TYPE II CYCLOADDITIONS OF CYCLOPROPYL-SUBSTITUTED ETHYLENE WITH TETRACYANOETHYLENE
作者:Fumio Kataoka、Shinya Nishida
DOI:10.1246/cl.1980.1115
日期:1980.9.5
Structure-reactivity sequences of two cycloadditions, distinctive in pattern, between cyclopropylethylene and tetracyanoethylene were totally different. In the type I, a bulky group at C2 decreased the rate of the reaction, whereas, in the type II, bulky alkyls at C2 enhanced the reactivity. The results accommodate to a proposed scheme involving an electron transfer step.
环丙基乙烯和四氰基乙烯之间的两种环加成反应的结构-反应序列完全不同。在类型 I 中,C2 上的庞大基团降低了反应速率,而在类型 II 中,C2 上的庞大烷基增强了反应性。结果适用于涉及电子转移步骤的提议方案。