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【结 构 式】

【分子编号】33070

【品名】7-amino-4-methyl-2H-1,4-benzoxazin-3(4H)-one

【CA登记号】

【 分 子 式 】C9H10N2O2

【 分 子 量 】178.19068

【元素组成】C 60.66% H 5.66% N 15.72% O 17.96%

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:(VI)

Benzoxazinone (IV) was prepared by condensation of 2-amino-5-nitrophenol (I) with either chloroacetyl chloride (II) in the presence of NaHCO3 or ethyl bromoacetate (III) in the presence of KF. Subsequent N-alkylation of (IV) with iodomethane provided (V). After reduction of the nitro group of (V) to amine (VI) by hydrogenation over Pd/C, condensation with benzyl chloroformate afforded carbamate (VII). The chiral oxazolidinone (IX) was obtained by reaction of (VII) with (-)-(R)-glycidyl butyrate (VIII) in the presence of butyllithium in THF at low temperature. Conversion of (IX) to mesylate, followed by displacement with NaN3 gave azide (X). Amine (XI) was then obtained by either hydrogenation of (X) over Pd/C or by reduction with trimethyl phosphite. Finally, reaction of (XI) with acetyl chloride and triethylamine provided the title acetamide.

1 Haebich, D.; Haerter, M.; Bartel, S.; Riedl, B.; Stolle, A.; Raddatz, S.; Kroll, H.P.; Guarnieri, W.; Endermann, R.; Wild, H.; Rosentreter, U.; Ruppelt, M.; Synthesis and antibacterial activity of novel heteroaryl oxazolidinones: II. Benzoxazinone- and benzthiazinone-oxazolidinones. 39th Intersci Conf Antimicrob Agents Chemother (Sept 26 1999, San Francisco) 1999, Abst F566.
2 Shridhar, D.R.; et al.; A facile synthesis of 2-alkyl(aryl)-6- and -7-nitro-3-oxo-3,4-dihydro-2H-1,4-benzoxazines. Synthesis 1982, 986.
3 Endermann, R.; Habich, D.; Ruppelt, M.; Raddatz, S.; Rosentreter, U.; Riedl, B.; Bartel, S.; Wild, H.; Stolle, A.; Guarnieri, W.; Kroll, H.-P. (Bayer AG); Novel bicyclene-substd. oxazolidinones. DE 19802239; WO 9937641 .
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) 33067 2-amino-5-nitrophenol 121-88-0 C6H6N2O3 详情 详情
(II) 11296 2-Chloroacetyl chloride; Chloroacetic chloride 79-04-9 C2H2Cl2O 详情 详情
(III) 16640 Ethyl 2-bromoacetate; Ethyl bromoacetate 105-36-2 C4H7BrO2 详情 详情
(IV) 33068 7-nitro-2H-1,4-benzoxazin-3(4H)-one C8H6N2O4 详情 详情
(V) 33069 4-methyl-7-nitro-2H-1,4-benzoxazin-3(4H)-one C9H8N2O4 详情 详情
(VI) 33070 7-amino-4-methyl-2H-1,4-benzoxazin-3(4H)-one C9H10N2O2 详情 详情
(VII) 33071 benzyl 4-methyl-3-oxo-3,4-dihydro-2H-1,4-benzoxazin-7-ylcarbamate C17H16N2O4 详情 详情
(VIII) 18385 (2R)oxiranylmethyl butyrate;(R)-glycidyl butyrate 60456-26-0 C7H12O3 详情 详情
(IX) 33072 7-[(5R)-5-(hydroxymethyl)-2-oxo-1,3-oxazolidin-3-yl]-4-methyl-2H-1,4-benzoxazin-3(4H)-one C13H14N2O5 详情 详情
(X) 33073 7-[(5R)-5-(azidomethyl)-2-oxo-1,3-oxazolidin-3-yl]-4-methyl-2H-1,4-benzoxazin-3(4H)-one C13H13N5O4 详情 详情
(XI) 33074 7-[(5S)-5-(aminomethyl)-2-oxo-1,3-oxazolidin-3-yl]-4-methyl-2H-1,4-benzoxazin-3(4H)-one C13H15N3O4 详情 详情
Extended Information