Synthetic photochemistry. A synthesis of the carbon skeleton found in taylorione from Mylia taylorii, using the di-π-methane rearrangement
作者:Gerald Pattenden、Derek Whybrow
DOI:10.1039/p19810001046
日期:——
Synthetic routes to the E- and Z-cyclopentenones (20) and (25), which incorporate photosensitive 1,4-diene systems, are described. Irradiation of the E-cyclopentenone (20) is shown to result in efficient regiospecific di-π-methane rearrangement (>70%) to the vinylcyclopropane (26), which is then converted into trans-deoxytaylorione (28). Irradiation of the corresponding Z-cyclopentenone (25) also leads
描述了到E-和Z-环戊烯酮(20)和(25)的合成路线,所述路线包含光敏的1,4-二烯系统。E-环戊烯酮(20)的辐照显示导致乙烯基环丙烷(26)有效的区域特异性二-π-甲烷重排(> 70%),然后乙烯基环丙烷(26)转化为反式-脱氧taylorione(28)。相应的Z-环戊烯酮(25)的辐照也导致(26),大概是通过Z - E光异构化产生的E-环戊烯酮(20)。