Ok, So we have the Copper Chromite dehydrogenation of BDO, the semi-completed GABA/Nitrite, but how about some more novel routes to GBL...
The Australian government has recently taken steps to begin to restrict these following chemicals in an effort to fight GHB.
4-HYDROXY-BUTANOIC ACID NITRILE
4-HYDROXYBUTANAL
2-HYDROXYTETRAHYDROFURAN
2-PYRROLIDONE
4-HYDROXY PENTANOIC ACID
4-HYDROXY BUTANOIC ACID LACTONE
Do any of these present a viable starting material?