반응 #80991

반응 방정식

α-isocyanato-valine methyl ester

2-(hydroxymethyl)-4-isopropylthiazole

→

desired compound

수율 52.3%

N-((4-Isopropyl-2-thiazolyl)methoxycarbonyl)valine Methyl Ester

수율 52.3%

용매

chloroform

반응 조건

후처리

1. 1
   온도at reflux for 3 h
2. 2
   온도to cool
3. 3
   기타the solvent was removed in vacuo
4. 4
   기타the residue was purified by silica gel chromatography

실험 절차

A solution of 1.4 mmol of α-isocyanato-valine methyl ester and 0.22 g (1.4 mmol) of 2-(hydroxymethyl)-4-isopropylthiazole in 10 ml of chloroform was heated at reflux for 3 h. After being allowed to cool, the solvent was removed in vacuo, and the residue was purified by silica gel chromatography using 2% methanol in chloroform to provide 0.23 g (52%) of the desired compound (Rf 0.54, 5% methanol in dichloromethane). NMR 1H NMR (DMSO-d6) δ0.87 (d, J=7 Hz, 3H), 0.88 (d, J=7 Hz, 3H), 1.23 (d, J=7 Hz, 6H), 2.04 (octet, J=7 Hz, 1H), 3.01 (heptet, J=7 Hz, 1H), 3.73 (s, 3H), 3.94 (dd, J=8, 6 Hz, 1H), 5.26 (AA', 2H), 7.28 (s, 1H), 7.92 (d, J=8 Hz, 1H). Mass spectrum: (M+H)+ =315.

출처