Conversion of limonene to prostanoic acid and 8-isoprostanoic acid.
作者:HIROSHI SUEMUNE、TETSUYA KAWAHARA、KIYOSHI SAKAI
DOI:10.1248/cpb.34.550
日期:——
Prostanoic acid (18) and 8-isoprostanoic acid (1) constitute the basic structures of primary prostaglandins and 8-isoprostaglandins. The conversion of commercially available (+)- and (-)-limonene to these compounds was accomplilshed by a sequence of reactions involving the Rh(I)-catalyzed cyclization of 3, 4-disubstituted 4-pentenals, which were easily prepared from (+)- or (-)-limonene, to cis-3, 4-disubstituted cyclopentanones and the appropriate modification of substituents on the five-membered ring.
前列腺素的基本结构由前列腺素酸(18)和8-异前列腺素酸(1)构成。通过一系列反应实现了市售的(+)-和(-)-柠檬烯向这些化合物的转化,这些反应包括利用铑(I)催化的3,4-二取代4-戊烯醛的环化反应,这些醛很容易从(+)-或(-)-柠檬烯制备,得到顺式3,4-二取代环戊酮,并对五元环上的取代基进行适当的修饰。