A number of α-(trifluoromethyl)heteroarylmethanols 2a—c are conveniently obtained in good yields by substitution of pyrole, furan, and thiophene with trifluoroacetaldehyde ethyl hemiacetal (TFAE); 2b and 2c are formed only in the presence of a catalyst such as ZnCl2. Analogous methanols 8a and 8b are also prepared by catalytic substitution of uracils with TFAE in moderate yields.
许多α-(三
氟甲基)杂芳基
甲醇2a-c可以通过用三
氟乙醛乙基
半缩醛(TFAE)取代
吡咯、
呋喃和
噻吩以良好的收率方便地获得;图2b和2c仅在催化剂如ZnCl 2 存在下形成。类似的
甲醇 8a 和 8b 也可以通过用 TFAE 催化取代尿
嘧啶以中等产率制备。