반응 #792014

반응 방정식

thiopropoxide

N-[3-(diethylamino)propyl]-4-(4-methoxyphenyl)-5-phenyl-1H-pyrazole-1-acetamide

sodium

propanethiol

HCl

→

gummy product

수율 99.0%

N-[3-(Diethylamino)propyl]-4-(4-hydroxyphenyl)-5-phenyl-1H-pyrazole-1-acetamide

수율 99.0%

용매

methylene dichloride

DMF

DMF

반응 조건

후처리

1. 1
   온도The reaction was chilled
2. 2
   기타was stripped under vacuum at 30°
3. 3
   세척washed with aqueous sodium carbonate
4. 4
   건조The methylene chloride was dried over sodium sulfate
5. 5
   기타the solvent removed in vacuo

실험 절차

A solution of 14 g (00.33 mol) of N-[3-(diethylamino)propyl]-4-(4-methoxyphenyl)-5-phenyl-1H-pyrazole-1-acetamide of example 34 and 0.16 mol of the sodium salt of 1 propanethiol in 375 mL of DMF was heated at 155°-160° C. for 2 hours. The reaction was chilled and the excess thiopropoxide was neutralized with ethanolic HCl. The DMF solution was stripped under vacuum at 30°, dissolved in methylene dichloride, and washed with aqueous sodium carbonate, then water, and finally brine. The methylene chloride was dried over sodium sulfate and the solvent removed in vacuo to yield 13.4 g of gummy product. Seven grams of the gummy product was chromatographed on a silica gel column eluted with methanol/isopropylamine/chloroform (2:3:95) to yield 5.1 g of purified product. The residue was taken up in isopropyl acetate, washed twice with water, washed once with brine, and dried over sodium sulfate. The isopropyl acetate was evaporated in vacuo, but removal of the last traces of isopropyl acetate required extensive drying under high vacuum to yield 2.5 g of product as a glass.

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