作者:Baldur Föhlisch、Derar Abu Bakr、Peter Fischer
DOI:10.1021/jo011087p
日期:2002.5.1
substituent at C-4, we investigated solvolysis reactions of the thiatricycle 2, obtained from spiro[2.4]hepta-4,6-diene (1) and thiophosgene by [4 + 2] cycloaddition. With methanol or ethanol a mixture of the esters 7 and 8 was formed. Desulfurization of the thionoesters 8 gave methyl and ethyl spiro[2.4]hepta-4,6-diene-4-carboxylate (10a,b). The corresponding alcohol (11) was prepared from 10b by LiAlH(4)
旨在合成在C-4处具有碳取代基的螺[2.4]庚-4,6-二烯,我们研究了从螺[2.4]庚-4,6-二烯(1)中获得的硫三环2的溶剂分解反应。和硫光气经[4 + 2]环加成。用甲醇或乙醇形成酯7和8的混合物。硫代磺酸酯8的脱硫得到螺和螺[2.4]庚-4,6-二烯-4-羧酸甲酯(10a,b)。通过LiAlH(4)还原从10b制备相应的醇(11)。乙四腈与4-取代的螺[2.4]庚-4,6-二烯结合,得到[4 + 2]环加合物12a-c。11和2-氯丙烯腈之间的Diels-Alder反应得到螺(双环[2.2.1]庚-5-烯-7,1'-环丙烷)衍生物14a,该衍生物可通过三步转化为rac-10-羟基樟脑(17) 。