Acetylenic and Polyacetylenic Compounds Derived from Thiophene, Furan, and<i>p</i>-Dibromobenzene Using 1,1-Dichloro-2,2-difluoroethene
作者:Kunio Okuhara
DOI:10.1246/bcsj.54.2045
日期:1981.7
Compounds of the type AZCF=CCl2, prepared from AZA (thiophene, furan, and p-dibromobenzene; Z=2,5-thiophenediyl, 2,5-furandiyl, and p-phenylene; A=H or Br), were converted into CCl2=CFZC≡CH, CCl2=CFZC≡CCF=CCl2, and CCl2=CFZC≡CSi(CH3)3 in a one-flask procedure via LiZC≡CLi. The products were further converted into acetylenic compounds such as (CH3)3SiC≡CZC≡CSi(CH3)3 and (CH3)3SiC≡CZC≡C–C≡CSi(CH3)3.
AZCF=CCl2 类型的化合物,由 AZA(噻吩、呋喃和对二溴苯;Z=2,5-噻吩二基、2,5-呋喃二基和对亚苯基;A=H 或 Br)制备,转化为CCl2=CFZC≡CH, CCl2=CFZC≡CCF=CCl2, 和 CCl2=CFZC≡CSi(CH3)3 在一个烧瓶过程中通过 LiZC≡CLi。产物进一步转化为炔属化合物,如(CH3)3SiC≡CZC≡CSi(CH3)3和(CH3)3SiC≡CZC≡C-C≡CSi(CH3)3。分离出1-乙炔基-4-(1,3-丁二炔基)苯。2,5-二乙炔基噻吩和呋喃分别由噻吩和呋喃通过 CCl2=CFZCF=CCl2 分两步制备。通过在吡啶中用乙酸铜(II)水合物处理,不仅从CCl2≡CFZC≡CH而且还从CCl2=CFZC≡CSi(CH3)3得到(CCl2=CFZC≡C-)2。