termini (lla-i) is described. The methylene groups between the alkyne units vary between n = 12 (a) and n = 4 (i). Ring closing metathesis with Mo(CO) 6 /CF 3 C 6 H 4 OHyielded the monocyclic alkyne 12a with 11a as starting material, whereas 11b-g yielded the cyclic diynes 13b-g. Detailed structural parameters were obtained for 13b and 13c by X-ray crystallography.
描述了在末端 (lla-i) 处具有甲基的 α,ω-二炔的制备。炔烃单元之间的亚甲基在 n = 12 (a) 和 n = 4 (i) 之间变化。用Mo(CO) 6 /CF 3 C 6 H 4 OH进行闭环复分解得到单环炔烃12a,以11a为起始原料,而11b-g得到环状二炔烃13b-g。通过 X 射线晶体学获得了 13b 和 13c 的详细结构参数。
A Novel method for the catalytic partial hydrogenation of diolefins to mono-olefins. Preparation of cycloalkenes
作者:A. J. Hubert
DOI:10.1039/j39670002149
日期:——
alumina are extremely active catalysts for the migration of double bonds. Selective reduction of the conjugated isomers (formed in situ) of diolefins to mono-olefins occurs in the presence of hydrogen. For open-chain compounds an equilibrium mixture of mono-olefins is obtained, so that the preparative value is limited to the simple (higher) cyclic hydrocarbons. Complete reduction occurs with cyclohexadiene