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【结 构 式】

【分子编号】39627

【品名】1-(4-allyl-3-hydroxy-5,6,7,8-tetrahydro-2-naphthalenyl)-1-ethanone

【CA登记号】

【 分 子 式 】C15H18O2

【 分 子 量 】230.30672

【元素组成】C 78.23% H 7.88% O 13.89%

与该中间体有关的原料药合成路线共 1 条

合成路线1

该中间体在本合成路线中的序号:(III)

The condensation of 6-acetyl-7-hydroxy-1,2,3,4-tetrahydronaphthalene (I) with allyl bromide (A) by means of K2CO3 in DMF gives 6-acetyl-7-allyloxy-1,2,3,4-tetrahydronaphthalene (II), which is isomerized to 5-allyl-7-acetyl-6-hydroxy-1,2,3,4-tetrahydronaphthalene (III) by heating at 200 C. Hydrogenation of (III) with H2 over Pd/C in ethanol affords 5-propyl-7-acetyl-6-hydroxy-1,2,3,4-tetrahydronaphthalene (IV), which is then cyclized with diethyl oxalate (B) by means of sodium ethoxide in refluxing etha-nol to yield ethyl 10-propyl-4-oxo-6,7,8,9-tetrahydro-4H-naphtho[2,3-b]pyran-2-carboxylate (V) [an alternative way to prepare (V) is the cyclization of (III) with diethyl oxalate (B) by means of sodium ethoxide to give ethyl 10-allyl-4-oxo-6,7,8,9-tetrahydro-4H-naphtho[2,3-b]pyran-2-carboxylate (VI), which is then reduced to (V) with H2 over Pd/C in ethanol]. The nitration of (V) with nitric acid in sulfuric acid gives ethyl 10-propyl-4-oxo-5-nitro-6,7,8,9-tetrahydro-4H-naphtho[2,3-b]pyran-2-carboxylate (VII), which is reduced with H2 over Pd/C in ethanol-acetic acid to afford the corresponding amino derivative (VIII). Finally, this compound is diazotated with NaNO2 and H2SO4 and then treated with 50% H2SO4 at 120 C.

1 Brown, R.C.; et al.; DE 2553688 .
2 BE 0836121 .
3 Castañer, J.; Blancafort, P.; Hillier, K.; Serradell, M.N.; Proxicromil. Drugs Fut 1979, 4, 12, 889.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(A) 11463 3-Bromo-1-propene; 3-Bromopropene;allyl bromide 106-95-6 C3H5Br 详情 详情
(B) 17571 Diethyl oxalate; Ethyl 2-ethoxy-2-oxoacetate 95-92-1 C6H10O4 详情 详情
(I) 39625 1-(3-hydroxy-5,6,7,8-tetrahydro-2-naphthalenyl)-1-ethanone C12H14O2 详情 详情
(II) 39626 1-[3-(allyloxy)-5,6,7,8-tetrahydro-2-naphthalenyl]-1-ethanone C15H18O2 详情 详情
(III) 39627 1-(4-allyl-3-hydroxy-5,6,7,8-tetrahydro-2-naphthalenyl)-1-ethanone C15H18O2 详情 详情
(IV) 39628 1-(3-hydroxy-4-propyl-5,6,7,8-tetrahydro-2-naphthalenyl)-1-ethanone C15H20O2 详情 详情
(V) 39629 ethyl 4-oxo-10-propyl-6,7,8,9-tetrahydro-4H-benzo[g]chromene-2-carboxylate C19H22O4 详情 详情
(VI) 39630 ethyl 10-allyl-4-oxo-6,7,8,9-tetrahydro-4H-benzo[g]chromene-2-carboxylate C19H20O4 详情 详情
(VII) 39631 ethyl 5-nitro-4-oxo-10-propyl-6,7,8,9-tetrahydro-4H-benzo[g]chromene-2-carboxylate C19H21NO6 详情 详情
(VIII) 39632 ethyl 5-amino-4-oxo-10-propyl-6,7,8,9-tetrahydro-4H-benzo[g]chromene-2-carboxylate C19H23NO4 详情 详情
Extended Information