【结 构 式】 |
【分子编号】16564 【品名】(2R,11S)-2-methyl-11-[(2E,6E,10E)-3,7,11,15-tetramethyl-2,6,10,14-hexadecatetraenyl]tetracyclo[10.2.1.0(2,11).0(4,9)]pentadeca-4,6,8,13-tetraene-3,10-dione 【CA登记号】 |
【 分 子 式 】C36H46O2 【 分 子 量 】510.76004 【元素组成】C 84.66% H 9.08% O 6.26% |
合成路线1
该中间体在本合成路线中的序号:(XI)1) The Diels-Alder cyclization of butadiene (I) with 2-methylbenzophenone (II) by means of acetic acid in refluxing toluene followed by oxidation with ceric ammonium nitrate gives 2-methyl-1,4-naphthoquinone (III), which by a new Diels-Alder cyclization with cyclopentadiene (IV) yields 4aalpha-methyl-1,4,4a,5,8,9a-hexahydro-1alpha,4alpha-methanoanthraquinone (V). The alkylation of (V) with 3,7,11,15-tetramethyl-2(E),6(E),10(E),14-hexadecatetraeanyl bromide (VI) by means of potassium tert-butoxide in THF affords the alkylated anthraquinone (VII), which is submitted to a retro Diels-Alder reaction in refluxing toluene containing dichlorodicyanobenzoquinone (DDQ) in order to obtain a simultaneous dehydrogenation. 2) The Diels-Alder cyclization of 1,4-naphthoquinone (VIII) with cyclopentadiene as before gives 1,4,4a,9a-tetrahydro-1,4-methanoanthraquinone (IX), which is alkylated with the alkyl bromide (VI) as before to yield the alkylated anthraquinone (X). The methylation of (X) with methyl iodide and potassium tert-butoxide affords the 9a-methylated anthraquinone (XI), which is finally submitted to a retro Diels-Alder reaction in refluxing toluene.
【1】 Graul, A.; Castañer, J.; Menatetrenone. Drugs Fut 1996, 21, 6, 615. |
【2】 Hamamura, K.; Iwama, T.; Seki, C.; Konishi, M. (Eisai Co., Ltd.); Preparation process of quinone deriv. and intermediate for the preparation thereof. EP 0613877 . |
【3】 Hamamura, K.; Seki, C.; Konishi, M. (Eisai Co., Ltd.); Preparation process of naphthoquinone derivs. and intermediates for the preparation thereof. EP 0636598 . |
中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
---|---|---|---|---|---|---|
(I) | 11579 | 1,3-Butadiene; Butadiene | 106-99-0 | C4H6 | 详情 | 详情 |
(II) | 16555 | 2-methyl-2,5-cyclohexadiene-1,4-dione; 2-methylbenzo-1,4-quinone | 553-97-9 | C7H6O2 | 详情 | 详情 |
(III) | 16556 | 2-methyl-5,8-dihydro-1,4-naphthalenedione | C11H10O2 | 详情 | 详情 | |
(IV) | 11183 | 1,3-Cyclopentadiene | C5H6 | 详情 | 详情 | |
(V) | 16558 | (2R)-2-methyltetracyclo[10.2.1.0(2,11).0(4,9)]pentadeca-4(9),6,13-triene-3,10-dione | C16H16O2 | 详情 | 详情 | |
(VI) | 16559 | (2E,6E,10E)-1-bromo-3,7,11,15-tetramethyl-2,6,10,14-hexadecatetraene | C20H33Br | 详情 | 详情 | |
(VII) | 16560 | (2R,11S)-2-methyl-11-[(2E,6E,10E)-3,7,11,15-tetramethyl-2,6,10,14-hexadecatetraenyl]tetracyclo[10.2.1.0(2,11).0(4,9)]pentadeca-4(9),6,13-triene-3,10-dione | C36H48O2 | 详情 | 详情 | |
(VIII) | 16561 | naphthoquinone; 1,4-Naphthoquinone | 130-15-4 | C10H6O2 | 详情 | 详情 |
(IX) | 16562 | tetracyclo[10.2.1.0(2,11).0(4,9)]pentadeca-4,6,8,13-tetraene-3,10-dione | C15H12O2 | 详情 | 详情 | |
(X) | 16563 | (2S)-2-[(2E,6E,10E)-3,7,11,15-tetramethyl-2,6,10,14-hexadecatetraenyl]tetracyclo[10.2.1.0(2,11).0(4,9)]pentadeca-4,6,8,13-tetraene-3,10-dione | C35H44O2 | 详情 | 详情 | |
(XI) | 16564 | (2R,11S)-2-methyl-11-[(2E,6E,10E)-3,7,11,15-tetramethyl-2,6,10,14-hexadecatetraenyl]tetracyclo[10.2.1.0(2,11).0(4,9)]pentadeca-4,6,8,13-tetraene-3,10-dione | C36H46O2 | 详情 | 详情 |