Reactions of diynes RCC-X-CCR with zirconocene ethylene complex Cp2Zr(CH2=CH2) were investigated. When X was C6H4 or C4H2S, bridged zirconacyclopentenes were selectively formed. They were easily converted into bridged cyclopentenone derivatives. In the case of (CH2)n groups as X, the reaction products were strongly dependent on the R group.
研究了二炔类化合物 RCC-X-CCR 与二茂锆乙烯络合物 Cp2Zr(CH2=CH2) 的反应。当 X 为 C6H4 或 C4H2S 时,选择性地形成了桥接的锆环戊烯。它们很容易转化为桥式环戊烯酮衍生物。当 X 为 (CH2)n 基团时,反应产物在很大程度上取决于 R 基团。
HMPA-Free Synthesis of TMS-Substituted Alkynes
作者:Marie Cordier、Daniel S. Müller、Marc Devillard
DOI:10.1021/acs.organomet.4c00091
日期:——
TMS-substituted alkynes are versatile building blocks in organic synthesis. Traditional synthesis involves alkyne deprotonation and the reaction with TMSCl. Recently, TMS-acetylene has become an increasingly inexpensive bulk chemical, offering an attractive alternative to accessing TMS-substituted alkynes, especially when the alkyne is expensive or not commercially available. However, this route has
Auderset, Philippe C.; Dreiding, Andre S.; Gesing, Ernst R. F., Synthetic Communications, 1983, vol. 13, # 11, p. 881 - 888
作者:Auderset, Philippe C.、Dreiding, Andre S.、Gesing, Ernst R. F.
DOI:——
日期:——
[6π+2π]-Cycloaddition of α,ω-Diallenes and α,ω-Diacetylenes to 1,3,5-Cycloheptatriene in the Presence of TiCl4-Et2AlCl
作者:V. A. D’yakonov、G. N. Kadikova、L. M. Khalilov、U. M. Dzhemilev
DOI:10.1134/s1070428013080071
日期:2013.8
[6 pi+2 pi]-Cycloaddition of alpha,omega-diallenes and alpha,omega-bis(trimethylsilyl)diacetylenes to 1,3,5-cycloheptatriene in the presence of a two-component catalytic system TiCl4-Et2AlCl was performed that led to the formation of bis(endo-bicyclo[4.2.1]nona-2,4-dienes) and bis(8-trimethylsilyl-endo-bicyclo[4.2.1]nona-2,4,7-trienes) linked by polymethylene spacer in 69-86% yields.
AUDERSET, P. C.;DREIDING, A. S., SYNTH. COMMUN., 1983, 13, N 11, 881-887