HRID1390403

反应详情

EQUATION

反应方程式

HRID 1390403 的结构方程式

AUXILIARIES

试剂、催化剂与溶剂

1

PROCEDURE

实验过程

Trichloroacetyl isocyanate (13.2 g, 70 mmole) was added to a stirred suspension of diphenylmethyl (6R,7R)-3-hydroxymethyl-7-(thien-2-ylacetamido)ceph-3-em-4 carboxylate (26.0 g, 50 mmole) in anhydrous acetone (600 ml) at 20°. The solid soon dissolved and after the mixture had been stirred at 20° for 1 hour it was chilled for 1 hour and the resulting solid was filtered off and washed with ether to give the title compound (33.1 g, 93%), m.p. 183° to 184°; [α]D21 + 24° (c 0.95 in DMSO); λinf.EtOH 235 nm (ε 14,500) and λinf.EtOH 256 nm (ε 8,820).

WORKUP

后处理

  1. dissolutionThe solid soon dissolved
  2. temperaturewas chilled for 1 hour
  3. filtrationthe resulting solid was filtered off
  4. washwashed with ether