| abstract |
NEW MATERIAL:A compound expressed by the formula (R 1 represents benzyl and R 2 represents trityl, H, tosyl or acyl; or R 1 represents H and R 2 represents acyl). n USE: An immunologically enhancing agent. n PREPARATION: A compound expressed by the formula wherein groups R 1 and R 2 both represent H is dissolved in pyridine and tritylated by adding trityl chloride. The reaction liquid is concentrated under reduced pressure, and the resultant residue is passed through a silica gel column and then eluted with a chloroform/methanol mixture, etc. Thus obtained ditritylated compound is dissolved in DMF, etc., and benzylated by adding benzyl bromide. n COPYRIGHT: (C)1990,JPO&Japio |