Studies on the reaction of
<i>N</i>
‐(3‐carbethoxy‐4,5,6,7‐tetrahydrobenzo[
<i>b</i>
]thien‐2‐yl)‐
<i>N</i>
′‐phenylthiourea with hydrazine hydrate (Part 1)
作者:Hassan A. H. El‐Sherief、Galal M. El‐Naggar、Zeinab A. Hozien、Suliman M. El‐Sawaisi
DOI:10.1002/jhet.5570450226
日期:2008.3
The reaction of N-(3-carbethoxy-4,5,6,7-tetrahydrobenzo[b]thien-2-yl)-N′-phenylthiourea (1) with hydrazine hydrate in 1-butanol afforded a mixture of compounds 2, 3 and 4. Treatment of 3 and 4 with nitrous acid gave 6 and 8 respectively, while reactions of 3 with acetylacetone gave 7. Synthesis of tetracyclic compounds 9a-f and 11 from the reactions of 3 with ethyl orthoformate or appropriate acids
的反应ñ - (3-乙酯基-4,5,6,7-四氢苯并[ b - ]噻吩-2-基)ñ '-phenylthiourea(1用在1-丁醇中的水合肼),得到的化合物的混合物2, 3和4。用亚硝酸处理3和4分别得到6和8,而3与乙酰丙酮的反应得到7。由3的反应合成四环化合物9a-f和11用原甲酸乙酯或适当的酸,酰氯,二硫化碳和/或氯甲酸乙酯。同样,其与异硫氰酸酯衍生物的反应得到了相应的硫代半脲12a,b,其随后在醇KOH中回流得到了未预期的四环产物14a,b。类似地,分别通过环化4和18获得四环化合物16a-e和19。