4-Methylmorpholine → HCID 88630118, compound

Participants

Reaction Conditions

Reaction Steps

Under a nitrogen atmosphere, 2-[2-(allyloxycarbonylamino)thiazol-4-yl]-2-(Z)-methoxyiminoacetic acid (231 mg, 0.81 mmol) was suspended in methylene chloride (5 ml) and the suspension was cooled to 0° C. 2-Chloro-4,6-dimethoxy-1,3,5-triazine (142 mg, 0.81 mmol) followed by N-methylmorpholine (0.09 ml, 0.81 mmol) were added and the solution was stirred at 0° C. for 30 minutes. A methylene chloride solution (10 ml) of allyl 3-(benzyloxycarbonyl)-7-(R,S)-amino-8-oxo-1,5-diazabicyclo[3.3.0]octa-2-ene-2-carboxylate chloride (0.81 mmol) followed by additional N-methylmorpholine (0.09 ml, 0.81 mmol) were added and the solution was stirred and allowed to warm gradually to room temperature over 1.5 hours. The methylene chloride was removed in vacuo and the resultant residue was flash chromatographed on silica gel eluted with 10% hexane:ethyl acetate to give 340 mg, 67% yield of the title compound: n.m.r. (90 MHz, CDCl3): δ 3.08 (dd, J=10.8 and 10.8, 1), 3.96 (s, 3), 3.99, 4.43 (ABq, J=12.6, 2), 3.88-4.28 (m, 2), 4.56-4.92 (m, 4), 5.16 (s, 2), 5.23 (d, J=9, 2), 5.42 (d, J=10.8, 2), 5.50-6.16 (m, 2), 7.10 (s, 1), 7.28 (br. s, 5), 8.09 (br. d, 1), 9.38 (br. s, 1); i.r. (CDCl3): 3025, 1731, 1704, 1557, 1386, 1369, 1277 cm-1 ; f.d.m.s. (m/e): M+ +1=625; u.v. (EtOH): εmax =264 (ε=10926), 338 (ε=6493); Anal. Calcd for C28H28N6O9S1 : Theory: C, 53.84; H, 4.52; N, 13.45; Found: C, 53.68; H, 4.59; N, 13.21.

Provenance & Evidence