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反応

Tributylphosphine → methyl 4-bromo-3-{(1S)-2-[(tert-butoxycarbonyl)amino]-1-methylethoxy}thiophene-2-carboxylate

HRID 1404981

印刷プレビュー

反応式

HRID 1404981 の反応式

[Br:1][C:2]1[C:3]([OH:11])=[C:4]([C:7]([O:9][CH3:10])=[O:8])[S:5][CH:6]=1.O[C@H:13]([CH3:23])[CH2:14][NH:15][C:16](=[O:22])[O:17][C:18]([CH3:21])([CH3:20])[CH3:19].C(P(CCCC)CCCC)CCC.N(C(OCC)=O)=NC(OCC)=O>C1COCC1>[Br:1][C:2]1[C:3]([O:11][C@@H:13]([CH3:23])[CH2:14][NH:15][C:16]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:22])=[C:4]([C:7]([O:9][CH3:10])=[O:8])[S:5][CH:6]=1

参加物実験手順後処理出典と根拠反応ノート

参加物

6

反応物 4

HCID 13831Tributylphosphine

HCID 220568ethyl N-ethoxycarbonyliminocarbamate

HCID 2777611Methyl 4-bromo-3-hydroxythiophene-2-carboxylate

HCID 12094522N-Boc-(R)-1-amino-2-propanol

生成物 1

HCID 67958910methyl 4-bromo-3-{(1S)-2-[(tert-butoxycarbonyl)amino]-1-methylethoxy}thiophene-2-carboxylate収率 65%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

実験手順

To a solution of methyl 4-bromo-3-hydroxythiophene-2-carboxylate (237 mg), tert-butyl [(2R)-2-hydroxypropyl]carbamate (175 mg), tri-n-butylphosphine (0.75 mL) and THF (10 mL) was added dropwise diethyl azodicarboxylate (40% toluene solution, 1.4 mL) at room temperature, and the mixture was stirred for 2 hr. The reaction solution was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (solvent gradient; 0→15% ethyl acetate/hexane) to give the title compound (239 mg, 65%) as a colorless oil.

後処理

concentrationThe reaction solution was concentrated under reduced pressure
customthe residue was purified by silica gel column chromatography (solvent gradient; 0→15% ethyl acetate/hexane)

出典と根拠

ORDレコード: ord-e99a8ec113e8466f9f3ec32932fd3c42
出典データセット: uspto-grants-2014_12
DOI: 10.6084/m9.figshare.5104873.v1
特許番号: US08916549B2

反応ノート

読み込み中…

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