Synthesis of (R)- and (R)-4-methyl-6-2?-methylprop-1?-enyl-5,6-dihydro-2H-pyran (Nerol oxide) and Natural Occurrence of its Racemate
作者:G�nther Ohloff、Wolfgang Giersch、Karl H. Schulte-Elte、Paul Enggist、Edouard Demole
DOI:10.1002/hlca.19800630626
日期:1980.9.17
3-epoxy-citronellols (5) was prepared from (−)-(R)-linalool (3) via epoxy alcohol 4 and then reduced to (−)-(R)-3-hydroxy-citronellol (6). Sensitizedphotooxygenation of (−)-(R)-diol 6 led in part to (−)-(R)-triol 8 which was cyclodehydrated by dilute acid to a mixture of diastereoisomeric tetrahydropyran-4-ols 9 and 10. Dehydration of hydroxy ethers 9 and 10 afforded (−)-(S)-nerol oxide (11) and (+)-(R)-nerol