HCID 67381486, compound → HCID 178451891, compound

Participants

Reaction Steps

A solution of the compound of Example 49A in glatial acetic acid (75 mL) was warmed at 60° C. for 3 h. The mixture was cooled and diluted with toluene and concentrated in vacuo. The remainder of the acetic acid was removed by azeotroping with toluene (2×) and the residue was chromatographed over a 360 g silica gel cartridge, eluting with 25-75% ethyl acetate in dichloromethane. These procedures afforded the product (10.0 g, 85%) as a light beige rigid foam.

Provenance & Evidence