The Formic Acid Rearrangement of 3,4-Dimethyl-1-pentyn-3-ol and 3-Isopropyl-4-methyl-1-pentyn-3-ol
作者:Tatsuo Takeshima、Ken Nagaoka、Masataka Yokoyama、Shigeki Morita
DOI:10.1246/bcsj.32.547
日期:1959.6
The behavior of 3,4-dimethyl-1-pentyn-3-ol (II) and 3-isopropyl-4-methyl-1-pentyn-3-ol (III) toward formic acid was investigated. The carbinols, as in the previous report, were chosen as model ones in which the tertiary carbon atom is adjacent to the carbon atom carrying the hydroxyl group. Both carbinols gave a significant quantity of the respective aldehydes. These aldehydes were easily isolated
研究了 3,4-二甲基-1-戊炔-3-醇 (II) 和 3-异丙基-4-甲基-1-戊炔-3-醇 (III) 对甲酸的行为。与之前的报告一样,甲醇被选为模型,其中叔碳原子与携带羟基的碳原子相邻。两种甲醇都产生大量相应的醛。这些醛很容易通过简单的蒸馏分离出来。II 以 45% 的产率得到 3,4-二甲基-3-戊烯-2-酮 (IIa),以 5% 的产率得到 3,4-二甲基-2-戊烯醛 (lib),一种新的醛。III以55%的产率得到3-异丙基-4-甲基-3-戊烯-2-酮(IIIa)和以6%的产率得到3-异丙基-4-甲基-2-戊烯醛(IIIb)。表征了这些羰基化合物。IIIb被氢化得到3-异丙基-4-甲基戊醛(IV),为2,4-二硝基苯腙。