• English
  • 简体中文
Login Register
Current Location: Home > Feedback Help Print

【结 构 式】

【分子编号】56935

【品名】N-[(1R,2R)-2-hydroxy-1-methyl-2-phenylethyl]-N-methylpropanamide

【CA登记号】

【 分 子 式 】C13H19NO2

【 分 子 量 】221.2994

【元素组成】C 70.56% H 8.65% N 6.33% O 14.46%

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:(I)

The chiral tetrahydropyran intermediate (XI) has been obtained as follows. The reaction of (-)-pseudoephedrine propionamide (I) with the allyl bromide (II) by the Myers' method gives pentenamide (III), which is reduced with LiNH2BH3 in THF to yield 2(S)-methyl-4-penten-1-ol (IV). Swern oxidation of (IV) affords the corresponding aldehyde (V), which is submitted to an asymmetric aldol condensation with the silyl enol ether (VI) catalyzed by Cu(OTf)2, (S)-Tol-BINAP and (Bu4N)Ph3SiF2 in THF to provide the adduct (VII). The methanolysis of (VII) with Me-OH in refluxing toluene gives the beta-keto ester (VIII), which is treated with Et2BOMe, NaBH4 and HF to yield the chiral hydroxy lactone (IX). The reduction of (IX) with DIBAL in THF affords the lactol (X), which is finally methylated with Ts-OH in refluxing methanol to provide the target tetrahydropyran intermediate (XI).

1 Bauer, M.; Maier, M.E.; Synthesis of the core structure of salicylihalamide A by intramolecular Suzuki reaction. Org Lett 2002, 4, 13, 2205.
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) 56935 N-[(1R,2R)-2-hydroxy-1-methyl-2-phenylethyl]-N-methylpropanamide C13H19NO2 详情 详情
(II) 11463 3-Bromo-1-propene; 3-Bromopropene;allyl bromide 106-95-6 C3H5Br 详情 详情
(III) 56936 (2S)-N-[(1R,2R)-2-hydroxy-1-methyl-2-phenylethyl]-N,2-dimethyl-4-pentenamide C16H23NO2 详情 详情
(IV) 56937 (2S)-2-methyl-4-penten-1-ol C6H12O 详情 详情
(V) 26241 (2S)-2-methyl-4-pentenal C6H10O 详情 详情
(VI) 53651 [(2,2-dimethyl-4-methylene-4H-1,3-dioxin-6-yl)oxy](trimethyl)silane; 2,2-dimethyl-4-methylene-4H-1,3-dioxin-6-yl trimethylsilyl ether n/a C10H18O3Si 详情 详情
(VII) 56938 6-[(2R,3S)-2-hydroxy-3-methyl-5-hexenyl]-2,2-dimethyl-4H-1,3-dioxin-4-one C13H20O4 详情 详情
(VIII) 56939 methyl (5R,6S)-5-hydroxy-6-methyl-3-oxo-8-nonenoate C11H18O4 详情 详情
(IX) 56940 (4S,6R)-4-hydroxy-6-[(1S)-1-methyl-3-butenyl]tetrahydro-2H-pyran-2-one C10H16O3 详情 详情
(X) 56941 (4S,6R)-6-[(1S)-1-methyl-3-butenyl]tetrahydro-2H-pyran-2,4-diol C10H18O3 详情 详情
(XI) 56942 (4S,6R)-2-methoxy-6-[(1S)-1-methyl-3-butenyl]tetrahydro-2H-pyran-4-ol C11H20O3 详情 详情
Extended Information