| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| —— | Toluene-4-sulfonic acid (2R,6S)-7-hydroxy-2,6-dimethyl-heptyl ester | 92934-93-5 | C16H26O4S | 314.446 |
| —— | Toluene-4-sulfonic acid (2R,6S)-2,6-dimethyl-7-((S)-1-phenyl-ethylcarbamoyloxy)-heptyl ester | 92934-92-4 | C25H35NO5S | 461.623 |
| —— | Toluene-4-sulfonic acid (2R,6S)-2,6-dimethyl-7-((S)-1-phenyl-ethylcarbamoyloxy)-heptyl ester | 92803-70-8 | C25H35NO5S | 461.623 |
The Diels–Alder product 3 was first transformed into the symmetrical nine-membered cyclic carbonate 8. Reaction of 8 with l-(−)-α-methylbenzylamine (12) yielded a mixture of optically active diastereoisomeric urethanes 9a (9, R = H, R′ = C6H5CHCH3NHCO—) and 9b (9, R = C6H5CHCH3NHCO—, R′ = H) which were separated and respectively converted into 11a and 11b. Compounds 11a and 11b were then transformed respectively into the optically active side chain alcohol 2 (R = H) of vitamine E (1).