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【结 构 式】

【分子编号】39591

【品名】3-[(1E,3E,5E,7E)-3,7-dimethyl-9-oxo-1,3,5,7-nonatetraenyl]-2,4,4-trimethyl-2-cyclohexen-1-yl acetate

【CA登记号】

【 分 子 式 】C22H30O3

【 分 子 量 】342.4784

【元素组成】C 77.16% H 8.83% O 14.01%

与该中间体有关的原料药合成路线共 2 条

合成路线1

该中间体在本合成路线中的序号:(XVI)

The reaction of vitamin A aldehyde (retinene) (XV) with NBS and acetic acid - acetic anhydride in CHCl3 gives 3-acetoxyretinene (XVI), which is reduced with NaBH4 in methanol to yield 3-acetoxyretinol (XVII). The reaction of (XVII) with triphenylphosphine and HCl in methanol affords 3-acetoxyretinyltriphenylphosphonium chloride (XVIII), which is condensed through a Wittig reaction with aldehyde (XVI) by means of sodium methoxide in isopropanol giving trans-isozeaxanthin (XIX). Finally, this compound is oxidized with aluminum isopropoxide in refluxing benzene - acetone.

1 Surmatis, J.D.; et al.; Synthesis of oxygenated carotenoids. Helv Chim Acta 1970, 53, 5, 974-990.
2 Surmatis, J.D.; US 3311656 .
3 Serradell, M.N.; Blancafort, P.; Castaner, J.; Hillier, K.; Canthazanthin. Drugs Fut 1979, 4, 7, 477.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(XV) 39590 (2E,4E,6E,8E)-3,7-dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2,4,6,8-nonatetraenal C20H28O 详情 详情
(XVI) 39591 3-[(1E,3E,5E,7E)-3,7-dimethyl-9-oxo-1,3,5,7-nonatetraenyl]-2,4,4-trimethyl-2-cyclohexen-1-yl acetate C22H30O3 详情 详情
(XVII) 39592 3-[(1E,3E,5E,7E)-9-hydroxy-3,7-dimethyl-1,3,5,7-nonatetraenyl]-2,4,4-trimethyl-2-cyclohexen-1-yl acetate C22H32O3 详情 详情
(XVIII) 39593 [(2E,4E,6E,8E)-9-[3-(acetoxy)-2,6,6-trimethyl-1-cyclohexen-1-yl]-3,7-dimethyl-2,4,6,8-nonatetraenyl](triphenyl)phosphonium chloride C40H46ClO2P 详情 详情
(XIX) 39594 3-[(1E,3E,5E,7E,9E,11E,13E,15E,17E)-18-(3-hydroxy-2,6,6-trimethyl-1-cyclohexen-1-yl)-3,7,12,16-tetramethyl-1,3,5,7,9,11,13,15,17-octadecanonaenyl]-2,4,4-trimethyl-2-cyclohexen-1-ol C40H56O2 详情 详情

合成路线2

该中间体在本合成路线中的序号:(XVI)

The reduction of retinene (XV) with NaBH4 in methanol gives retinol (XX), which by reaction with triphenylphosphine and H2SO4 is converted into retinyltriphenylphosphonium sulfate (XXI). The Wittig reaction of (XXI) with aldehyde (XVI) by means of sodium methoxide in benzene - methanol yields 3-acetylisocryptoxanthin (XXII), which by reaction with aqueous 68% HBr in methylene chloride, followed by a treatment with Na2CO3 affords dehydro-retro-carotene (XXIII).

1 Surmatis, J.D.; et al.; Synthesis of oxygenated carotenoids. Helv Chim Acta 1970, 53, 5, 974-990.
2 Serradell, M.N.; Blancafort, P.; Castaner, J.; Hillier, K.; Canthazanthin. Drugs Fut 1979, 4, 7, 477.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(XV) 39590 (2E,4E,6E,8E)-3,7-dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2,4,6,8-nonatetraenal C20H28O 详情 详情
(XVI) 39591 3-[(1E,3E,5E,7E)-3,7-dimethyl-9-oxo-1,3,5,7-nonatetraenyl]-2,4,4-trimethyl-2-cyclohexen-1-yl acetate C22H30O3 详情 详情
(XX) 39595 (2E,4E,6E,8E)-3,7-dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2,4,6,8-nonatetraen-1-ol 68-26-8 C20H30O 详情 详情
(XXI) 39596 [(2E,4E,6E,8E)-3,7-dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2,4,6,8-nonatetraenyl](triphenyl)phosphonium hydrogen sulfate C38H45O4PS 详情 详情
(XXII) 39597 2,4,4-trimethyl-3-[(1E,3E,5E,7E,9E,11E,13E,15E,17E)-3,7,12,16-tetramethyl-18-(2,6,6-trimethyl-1-cyclohexen-1-yl)-1,3,5,7,9,11,13,15,17-octadecanonaenyl]-2-cyclohexen-1-yl acetate C42H58O2 详情 详情
(XXIII) 39598 1,5,5-trimethyl-6-[(Z,2E,4E,6E,8E,10E,12E,14E,16E)-3,7,12,16-tetramethyl-18-(2,6,6-trimethyl-2-cyclohexen-1-ylidene)-2,4,6,8,10,12,14,16-octadecaoctaenylidene]-1-cyclohexene C40H54 详情 详情
Extended Information