The chemistry of terpenes. Part XIV. Syntheses of (±)- and (+)-fenchone, and (+)-cis-2,2,5-trimethyl-3-vinylcyclopentanone, a photoisomer of (–)-trans-caran-4-one
作者:P. H. Boyle、W. Cocker、D. H. Grayson、P. V. R. Shannon
DOI:10.1039/j39710002136
日期:——
Treatment of (+)-α-2,3-epoxypinane or (–)-trans-pinocarveol with hydrogen bromide gives a mixture in which (–)-2-endo-bromo-6-exo-hydroxy-1,3,3-trimethylbicyclo[2,2,1]heptane is the major product. With silver acetate this affords (–)-2,2,4-trimethylcyclopent-3-enylacetaldehyde, which gives (–)-4-(2-hydroxyethyl)-1,3,3-trimethylcyclopentene on reduction. The alcohol reacts with peracetic acid giving
用溴化氢处理(+)-α-2,3-环氧pin烷或(-)-反式-香樟醇时得到的混合物中,(-)-2-内-溴-6-外-羟基-1,3,3 -三甲基双环[2,2,1]庚烷是主要产物。用乙酸银可以得到(-)-2,2,2-三甲基环戊-3-烯基乙醛,还原后可以得到(-)-4-(2-羟乙基)-1,3,3-三甲基环戊烯。醇与过氧乙酸反应,得到几乎定量的(-)-β-1,2-环氧-4β-(2-羟乙基)-1,3,3-三甲基环戊烷,三氟化硼的产率为(+)-顺式-3-(2-羟乙基)-2,2,5-三甲基环戊酮。用碱处理相应的氯酮得到(+)-甲酮。