One-Pot Formation and Derivatization of Di- and Triynes Based on the Fritsch−Buttenberg−Wiechell Rearrangement
作者:Thanh Luu、Yasuhiro Morisaki、Nina Cunningham、Rik R. Tykwinski
DOI:10.1021/jo701810g
日期:2007.12.1
A divergent, one-pot synthesis of functionalized polyynes has been developed. Beginning with the appropriately substituted dibromoolefinic precursor, a carbenoid Fritsch−Buttenberg−Wiechell (FBW) rearrangement is used to generate the lithium acetylide of a conjugated polyyne framework, and subsequent trapping with carbon-based electrophiles provides for in situ formation of a wide range of di- and
One-Pot Synthesis and Functionalization of Polyynes via Alkylidene Carbenoids
作者:Rik Tykwinski、Thanh Luu、Yasuhiro Morisaki
DOI:10.1055/s-2007-1000937
日期:——
one-pot, two-step method for the synthesis of diynes and triynes is reported. The reaction of a dibromoolefinic precursor with BuLi effects a Fritsch-Buttenberg-Wiechell rearrangement and generates a lithium acetylide intermediate, which is then trapped with a variety of electrophiles to produce substituted diynes and triynes. Alternatively, transmetalation from the lithium acetylide to give a zinc acetylide
Ferrocen—acetylene VI. Synthese und lichtabsorption von ferrocenyl-polyinen
作者:Karl Schlögl、Wolfgang Steyrer
DOI:10.1016/s0022-328x(00)81520-x
日期:1966.10
ethynylferrocene by stepwise chain-lengthening (coupling with bromopropiolic acid) higher ferrocenyl polyacetylenic carboxylic acids (II, n = 2–4) were prepared which on decarboxylation gave ferrocenyl polyacetylenes (I). By oxidative dimerization of the latter diferrocenyl polyynes (V, n = 2, 4, 6, 8) were accessible, and by “mixed” coupling also ferrocenyl phenyl polyynes (IV n = 2–4).
从乙炔基二茂铁开始,逐步加长链(与溴丙酸偶联),制得高级二茂铁基聚炔羧酸(II,n = 2-4),脱羧后得到二茂铁聚乙炔(I)。通过后者的二铁茂铁基多炔(V,n = 2、4、6、8)的氧化二聚作用,通过“混合”偶联也可以得到二茂铁基苯基多炔(IV n = 2-4)。
Chodkiewicz, Annales de Chimie (Cachan, France), 1957, vol. <13> 2, p. 819,861, 862
作者:Chodkiewicz
DOI:——
日期:——
Stephan,E. et al., Bulletin de la Societe Chimique de France, 1972, p. 4781 - 4789