反应详情

The procedure of example 68 was repeated using 350 mg of [6R-[6-α, 7-β (Z)]]-7-[[[2-[ (diethoxy-phosphinyl)amino]-4-thiazolyl]-(methoxyimino)acetyl]-amino]-3-[[(1-methyl-1H-tetrazol-5-yl)thio]methyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid, (4-methoxyphenyl)methyl ester and 0.075 ml anisole in trifluoroacetic acid for 5 minutes. The product was obtained by acidification in aqueous bicarbonate and extraction with methylene chloride in the pH range 3.2 to 3.0 to give 200 mg of the desired product; MS ((+) FAB), 648 (M+H); NMR (300 MHz, d6 --DMSO) δ 1.28 (t, 6, OCH2CH3), 3.71 (pair of doublets, 2, endocyclic--CH2S--), 3.85 (s, 3, NCH3), 3.97 (s, 3, OCH3), 4.07 (m, 4, CH2OP=O), 4.33 (m, 2, exocyclic--CH2S--) 5.01 (d, 1, 6H of 7-ACA), 5.79 (dd, 1, of 7-ACA), 7.19 (d, 1, NH).

1. customfor 5 minutes
2. extractionextraction with methylene chloride in the pH