the like at a concentration of about 1 40 in an appropriate co solvent such as methanol ch 3 oh ethanol etoh ch 3 ch 2 oh acetone tetrahydrofuran thf and the like preferably 10 naoh etoh at 1 1 at the reflux temperature of the solvent over a period of about 15 minutes 2 hours preferably for about 2 hours at reflux to afford a compound 3 of the invention in method b phenol 1 is reacted with the oxazolidine tosylate 4 or any other suitable leaving group such as a mesylate triflate or iodide and a base such as sodium hydride sodium methoxide sodium hydroxide potassium t butoxide and the like preferably sodium hydride in a suitable solvent such as dmso dmf toluene ch 3 oh h 2 o and the like preferably in dmf at about 0 u00b0 c to the reflux temperature of the solvent for about 1 48 hours preferably at 100 u00b0 c for 18 hours to obtain an oxazolidine intermediate the oxazolidine intermediate is then subjected to acid hydrolysis using such acid as aqueous hcl aqueous h 2 so 4 acetic acid and the like at about 0 u00b0 c to the reflux.