反应详情

8 parts of 38% formaldehyde solution and 25 parts of 2N hydrochloric acid are added to a solution of 8.5 parts of 6-chlorooxazolo-[4,5-b]-pyridin-2-(3H)-one in 60 parts of water, and the whole is stirred for 4 hours at 50° to 60° C. After cooling with ice, filtration is performed and the residue is washed with ice water. There are obtained 8.5 parts of 3-hydroxymethyl-6-chloro-oxazolo[ 4,5-b]pyridin-2-(3H)-one (85% of theory), m.p. 137°-139° C.

1. temperatureAfter cooling with ice, filtration
2. washthe residue is washed with ice water