作者:D.A. Ben-Efraim、F. Sondheimer
DOI:10.1016/0040-4020(69)80027-x
日期:1969.1
The rearrangement of 1,5-hexadiyne (I) with potassium t-butoxide in t-butyl alcohol led mainly to a ca. 2:1 mixture of cis-1,3-hexadien-5-yne (IVa) and trans-1,3-hexadien-5-yne (IVb), and a minor amount of 2,4-hexadiyne (II). Both IVa and IVb were isolated and characterized. Contrary to previous reports, a similar result was obtained when the rearrangement of I was carried out with ethanolic potassium
1,5-己二炔(I)在叔丁醇中与叔丁醇钾重排的主要原因是 顺式-1,3-己二烯-5-炔(IVa)和反式-1,3-己二烯-5-炔(IVb)和少量2,4-己二炔(II)的2:1混合物。IVa和IVb均已分离并鉴定。与以前的报告相反,当用乙醇氢氧化钾进行I的重排时,获得了相似的结果,在这种情况下,还形成了2-乙氧基-2-己烯-4-炔(VIa)(源自II)。在叔丁醇中用叔丁醇钾将1,6-庚二炔(VIII)重排可得到大约相等量的甲苯和反式1,3-庚二烯-5-炔(Xb),但无顺式检测到-1,3-庚二烯-5-炔(Xa)。Xa和Xb的真实样品是通过IVa和IVb的甲基化制备的。