Many, many bees around here should learn one important simple labtechnique:
Thin Layer Chromatography (TLC, do a SEARCH on TLC here or at Rhodium.ws !).
TEST your isosafrole FIRST with TLC!
See if you get a more than 98% SINGLE spot, at a different place on the glass or paper plate, compared to sassafras and safrole!
You already checked the boiling points and any other here available data of your freshly made new compounds?
Because you could have ended up with still just Safrole again due to any mistake made, so use TLC with 3 different starting drops:
1. your original Sassafras oil,
2. your distilled/freezed-out Safrole
3. your supposed isosafrole!
If not done all of this first, rethink your labtechniques or/and your attitude, before you start doubting the methods proposed here!
Always doubt yourself first, you prolly make more common mistakes than the combined Hive resources.
TLC should be performed on all important steps in a first synthesis!
Combined with chemical data checks on all compounds.
This will also give any posts asking for help a MUCH heavier impact, and will convince the readers that you've done all you can to pinpoint the problem yourself FIRST!
You then will automatically receive much better answers.
Most, if not all problems brought to our attention here, are caused by sloppy labtechniques, hidden behind semi-scientific chemspeak from fresh members who have caught on to the words we use, but not yet to the skills needed.
The real cause is ofcourse :
More HASTE, less SPEED! LT/
: Take your time, don't do time.