中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | N-(2-((5aS,9aR)-1-(2,2-dimethoxyethyl)-4-methoxy-6-oxo-5a,6,7,9a-tetrahydrodibenzo[b,d]furan-9a-yl)ethyl)-N-methyl-2,4-dinitrobenzenesulfonamide | 1315614-19-7 | C26H29N3O11S | 591.596 |
—— | N-(2-((5aS,6S,9aR)-1-((1,3-dioxolan-2-yl)methyl)-6-hydroxy-4-methoxy-5a,6,7,9a-tetrahydrodibenzo[b,d]furan-9a-yl)ethyl)-N-methyl-2,4-dinitrobenzenesulfonamide | 1315614-13-1 | C26H29N3O11S | 591.596 |
—— | (4S,4aS,9bR)-9-((1,3-dioxolan-2-yl)methyl)-6-methoxy-9b-(2-(methylamino)ethyl)-3,4,4a,9b-tetrahydrodibenzo[b,d]furan-4-ol | 1315614-04-0 | C20H27NO5 | 361.438 |
—— | tert-butyl 2-((5'S,6'S)-6'-(3''-((1,3-dioxolan-2-yl)methyl)-2''-bromo-6''-methoxyphenoxy)-5'-(tert-butyldimethylsilyloxy)cyclohex-1'-enyl)ethyl(methyl)carbamate | 1315613-96-7 | C31H50BrNO7Si | 656.73 |
Formal total synthesis of ent-codeinone and ent-codeine was accomplished via the total synthesis of ent-neopinone attained in 14 steps from β-bromoethylbenzene. The key steps included (i) enzymatic dihydroxylation of β-bromoethylbenzene with E. coli JM109 (pDTG601a), an organism that overexpresses toluene dioxygenase, (ii) a Heck reaction to establish C-13 stereogenic center, (iii) aldol condensation, and (iv) 1,6-conjugate addition of the ethylamino side chain to C-9. Several other modes of construction of the C-9 and C-14 centers were also investigated: Mannich cyclization, and aza-Prins reaction. The synthesis of ent-codeinone was formalized by intersecting Fukuyama’s recently published approach. Experimental and spectral data are provided for all new compounds.