A new method for the synthesis of cyclopropane with three electron-withdrawing groups
作者:Chen Chen、Yao-Zeng Huang、Yanchang Shen
DOI:10.1016/0040-4039(88)85328-0
日期:1988.1
In the presence of trialkylstibine, dibromomalonic ester can react with electron-deficient olefins to give the title compounds in good yields.
在三烷基二b啶的存在下,二溴丙二酸酯可以与缺电子的烯烃反应,以高收率得到标题化合物。
Tributylstibine mediated synthesis of 1,1,2-tri-substituted cyclopropanes
作者:Chen Chen、Liao Yi、Huang Yao-Zeng
DOI:10.1016/s0040-4020(01)80128-9
日期:1989.1
CHEN, CHEN;LIAO, YI;HUANG, YAO-ZENG, TETRAHEDRON, 45,(1989) N0, C. 3011-3020
作者:CHEN, CHEN、LIAO, YI、HUANG, YAO-ZENG
DOI:——
日期:——
CHEN, CHEN;HUANG, YAO-ZENG;SHEN, YANCHANG, TETRAHEDRON LETT., 29,(1988) N 9, 1033-1036
作者:CHEN, CHEN、HUANG, YAO-ZENG、SHEN, YANCHANG
DOI:——
日期:——
Reactions of Enone Ethylene Ketals with Methyl Diazomalonate/Bis(acetylacetonato)copper(II)
作者:özkan Sezer、Ayşe Daut、Olcay Anaç
DOI:10.1002/hlca.19950780811
日期:1995.12.13
Several cyclic and acyclic enones and their ethylene ketals/acetals were reacted with dimethyl diazomalonate under bis(acetylacetonato)copper(II) catalysis. Cyclohex-2-en-1-one (1) yielded only C–H insertion products 2 and 3, whereas but-3-en-2-one gave a cyclopropane albeit in very low yield. The ethylene ketals 6 of cyclopent-2-en-1-one and cyclohex-2-en-1-one gave the corresponding cyclopropanes