Methylamine → 2-Methyl-2,7-diazaspiro[4.4]nonane-1,3,8-trione

반응식

C([O:3][C:4]([C:6]1([CH2:12][C:13]([O:15]CC)=O)[CH2:10][C:9](=[O:11])[NH:8][CH2:7]1)=O)C.[CH3:18][NH2:19]>>[CH3:18][N:19]1[C:13](=[O:15])[CH2:12][C:6]2([CH2:10][C:9](=[O:11])[NH:8][CH2:7]2)[C:4]1=[O:3]

참가 물질

반응물 2

HCID 6329Methylamine

HCID 12691859Ethyl 3-(2-ethoxy-2-oxoethyl)-5-oxopyrrolidine-3-carboxylate

생성물 1

HCID 42826302-Methyl-2,7-diazaspiro[4.4]nonane-1,3,8-trione

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온도: 220 °C

실험 절차

A solution of 20.3 g (0.084 mole) 3-ethoxycarbonyl-5-oxo-3-pyrrolidineacetic acid, ethyl ester [J. Org. Chem., 46, 2757 (1981)] in 40 ml of 40% aqueous methylamine was stirred at room temperature overnight, then placed in an oil bath and gradually heated to 220° C. over 30 minutes allowing volatiles to distill from the open flask. The crude product was crystallized from ethanol to afford 12.6 g of 2-methyl-2,7-diazaspiro[4.4]nonane-1,3,8-trione, mp 201-204° C.

후처리

customplaced in an oil bath
distillationto distill from the open flask
customThe crude product was crystallized from ethanol

출처 및 근거

ORD 기록: ord-6ba53aa765d24a9d9c301101944c2363
출처 데이터셋: uspto-grants-1992_03
DOI: 10.6084/m9.figshare.5104873.v1
특허 번호: US05097032

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