Now, did the teflon on your frying pan ever melt?
It is OK to solder a fitting which is taped or doped and threaded. However, we often look for a method to not solder directly on it. It is often possible to sweat a street elbow and/or short pieces of pipe to the male adapter first, then screw it into the body. This makes the first joint you have to sweat some distance away from the taped joint.