Polyfluorocycloalkenes. Part XIX. Some reactions and compounds from 1,2-bis(trifluoromethyl)octafluorocyclohexene
作者:David Collins、Robert Stephens、John Colin Tatlow
DOI:10.1016/s0022-1139(00)81941-7
日期:1986.7
back (A). Fluorination of compounds (C) and (B) afforded cis and trans 1H-1,2-bis(trifluoromethyl)nonafluorocyclohexane (J and H respectively). Both (H) and (J) were dehydrofluorinated to give olefin (A) exclusively, i.e. fluorine was lost preferentially from the tertiary →CF group. Ammonia and (A) gave 1,3-diamino-2-cyano-3-trifluoromethylhexafluorocyctohexene (K). Some hydro-polyfluoro-cyclohexanes
标题化合物(A)得到二氯加合物(D),其与氢化铝锂产生复杂的混合物,从其中分离出痕量的反式1H,2H- 1、2-双(三氟甲基)八氟环己烷(E)。烯烃(A)的催化氢化得到顺式1H,2H-1,2-双(三氟甲基)八氟环己烷(C)和少量的6H-1,6-双(三氟甲基)七氟环己烯(B)。用钾水溶液将顺式二氢化物(C)脱氟化氢得到烯烃(B)和2,3-双(三氟甲基)六氟环己-1,3-二烯(G):(G)被氟化钴(III)氟化(一种)。化合物(C)和(B)的氟化得到顺式和反式1H-1,2-双(三氟甲基)九氟环己烷(分别为J和H)。(H)和(J)都被脱氟化氢,仅得到烯烃(A),即氟优先从叔→CF基团中损失掉。氨和(A)得到1,3-二氨基-2-氰基-3-三氟甲基六氟环己烯(K)。一些氢-聚氟-环己烷在氘化氢存在下的脱氟化氢过程中吸收了少量的氘,但是没有观察到立体异构体对的相互转化。