| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| 3,5-二甲氧基-4-苯甲氧基安息香酸盐 | 4-(benzyloxy)-3,5-dimethoxybenzoic acid | 14588-60-4 | C16H16O5 | 288.3 |
| 4-苄氧基-3,5-二甲氧基苯甲醛 | 4-(benzyloxy)-3,5-dimethoxybenzaldehyde | 6527-32-8 | C16H16O4 | 272.301 |
| —— | methyl 4-benzyloxy-3,5-dimethoxybenzoate | 27065-65-2 | C17H18O5 | 302.327 |
| 丁香酸 | Syringic acid | 530-57-4 | C9H10O5 | 198.175 |
| 丁香酸甲酯 | methyl syringate | 884-35-5 | C10H12O5 | 212.202 |
| 丁香醛 | Syringaldehyde | 134-96-3 | C9H10O4 | 182.176 |
| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| —— | [4-(4-Benzyloxy-3,5-dimethoxy-benzyloxy)-3,5-dimethoxy-phenyl]-methanol | 670275-22-6 | C25H28O7 | 440.493 |
| —— | {4-[4-(4-Benzyloxy-3,5-dimethoxy-benzyloxy)-3,5-dimethoxy-benzyloxy]-3,5-dimethoxy-phenyl}-methanol | 670275-24-8 | C34H38O10 | 606.67 |
| —— | 4-(4-Benzyloxy-3,5-dimethoxy-benzyloxy)-3,5-dimethoxy-benzaldehyde | 670275-21-5 | C25H26O7 | 438.477 |
| —— | 4-{4-[4-(4-Benzyloxy-3,5-dimethoxy-benzyloxy)-3,5-dimethoxy-benzyloxy]-3,5-dimethoxy-benzyloxy}-3,5-dimethoxy-benzaldehyde | 670275-25-9 | C43H46O13 | 770.83 |
| —— | 4-[4-(4-Benzyloxy-3,5-dimethoxy-benzyloxy)-3,5-dimethoxy-benzyloxy]-3,5-dimethoxy-benzaldehyde | 670275-23-7 | C34H36O10 | 604.654 |
| 4-苄氧基-3,5-二甲氧基苯甲醛 | 4-(benzyloxy)-3,5-dimethoxybenzaldehyde | 6527-32-8 | C16H16O4 | 272.301 |
| —— | 2-(benzyloxy)-5-(bromomethyl)-1,3-dimethoxybenzene | 111194-05-9 | C16H17BrO3 | 337.213 |
| —— | 4-benzyloxy-3,5-dimethoxybenzyl chloride | —— | C16H17ClO3 | 292.762 |
| —— | 2-(4-benzyloxy-3,5-dimethoxyphenyl)ethylamine | 2176-16-1 | C17H21NO3 | 287.359 |
| 2-(3,5-二甲氧基-4-苯基甲氧基苯基)乙腈 | 4-benzyloxy-3,5-dimethoxyphenylacetonitrile | 2176-17-2 | C17H17NO3 | 283.327 |
| —— | ((E)-3-(4-benzyloxy)-3,5-dimethoxyphenyl)prop-2-en-1-ol | 178239-06-0 | C18H20O4 | 300.354 |
| —— | (E)-3-(4-benzyloxy-3,5-dimethoxyphenyl)acrylaldehyde | 178239-12-8 | C18H18O4 | 298.339 |
| —— | 4-benzyloxy-3,5-dimethoxycinnamic acid | 151539-25-2 | C18H18O5 | 314.338 |
A simple procedure for the asymmetric synthesis of lignans via chiral β-benzyl-γ-butyrolactones has been developed. The key benzylbutyrolactone intermediates were efficiently synthesized using a six-step procedure, starting from 3,4-(methylenedioxy)cinnamic acid. The key step in this sequence was a highly diastereoselective alkylation of an N-acyloxazolidinone enolate. The resulting β-benzyl-γ-butyrolactones were subsequently transformed into the benzylidene lignans gossypifan and savinin (hibalactone) via aldol condensation–dehydration reactions, and into the dibenzylbutyrolactone lignan 4′-demethylyatein, through alkylation. Oxidation of 4′-demethylyatein with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) afforded cis-and trans-benzylidenebenzylbutyrolactones, whereas oxidation with DDQ/TFA gave 4′-demethyl-deoxyisopodophyllotoxin. Keywords: lignans, synthesis, asymmetric, biosynthesis, oxidation, benzylbutyrolactones.