Double Mitsunobu Reactions of <i>cis</i>-Cycloalk-2-ene-1,4-diols and 3,4-Epoxycycloalkenes: Rearrangements of Allylic Diazides
作者:Hasan Seçen、Yaşar Sütbeyaz、Süleyman Göksu、Cagri Ozalp、Emin Saripinar
DOI:10.1055/s-2004-831258
日期:——
Double Mitsunobu reactions of cis-cycloalk-2-ene-1,4-diols and 3,4-epoxycloalkenes were investigated. cis-3,5-Diazidocyclopentene, cis-3,4-diazidocyclooctene, and cis-3,8-diazidocyclooctene were formed as sole products via the Mitsunobu reaction. cis-Cyclohex-2-ene-1,4-diol, 3,4-epoxycyclohexene and trans-2-azidocyclohex-3-en-1-ol gave a mixture of cis-3,6-diazidocyclohexene and cis-3,4-diazidocyclohexene via a sigmatropic rearrangement. In the same manner, cis-cyclohept-2-ene-1,4-diol, 3,4-epoxycycloheptene and trans-2-azidocyclohept-3-en-1-ol gave a mixture of cis-3,7-diazidocycloheptene and cis-3,4-diazidocycloheptene. Experimental results were explained by theoretical PM3 calculations.
研究了顺式-环烷-2-烯-1,4-二醇和 3,4-环氧环烯的双 Mitsunobu 反应。通过 Mitsunobu 反应生成的唯一产物是顺式-3,5-二氮杂环戊烯、顺式-3,4-二氮杂环辛烯和顺式-3,8-二氮杂环辛烯。顺式-2-环己烯-1,4-二醇、3,4-环氧环己烯和反式-2-叠氮环己烯-3-烯-1-醇通过等压重排生成了顺式-3,6-叠氮环己烯和顺式-3,4-叠氮环己烯的混合物。以同样的方式,顺式-2-环庚烯-1,4-二醇、3,4-环氧环庚烯和反式-2-叠氮环庚烯-3-烯-1-醇生成了顺式-3,7-叠氮环庚烯和顺式-3,4-叠氮环庚烯的混合物。理论 PM3 计算解释了实验结果。