NN-SYNTHESIZE Synthesis IN-OF of CD-ALPHANUM 3 STOP . DT A NN-MIXTURE mixture IN-OF of CD-ALPHANUM 2 -LRB- ( CD 1.1 NN-MASS g COMMA , CD 3.6 NN-AMOUNT mmol -RRB- ) COMMA , OSCAR-CM zinc OSCAR-CM oxide -LRB- ( CD 0.160 NN-MASS g COMMA , CD 0.196 NN-AMOUNT mmol -RRB- ) CC and OSCAR-CM acetic OSCAR-CM anhydride -LRB- ( CD 0.37 NN-MASS g COMMA , CD 3.6 NN-AMOUNT mmol -RRB- ) IN-IN in OSCAR-CM acetic OSCAR-CM acid -LRB- ( CD 4.3 NN-MASS g COMMA , CD 72 NN-AMOUNT mmol -RRB- ) VBD was VB-STIR stirred IN at NN-TEMP 30°C IN-FOR for CD 2 NN-TIME d STOP . DT The NN-CHEMENTITY reaction VBD was VB-QUENCH quenched IN-WITH with OSCAR-CJ saturated OSCAR-CM NaHCO3 COMMA , CC and DT the NN-CHEMENTITY mixture VBD was VB-EXTRACT extracted IN-WITH with OSCAR-CM Et2O STOP . DT The OSCAR-CJ combined OSCAR-CJ organic NN-CHEMENTITY layer VBD was VB-WASH washed IN-WITH with OSCAR-CM H2O CC and VB-DRY dried IN-OVER over OSCAR-CJ anhydrous OSCAR-CM Na2SO4 STOP . DT The NN-CHEMENTITY solvent VBD was VB-REMOVE removed IN-IN in NN-VACUUM vacuo COMMA , CC and DT the NN-CHEMENTITY residue VBD was VB-PURIFY purified IN-BY by NN-FLASH flash NN-COLUMN column NN-CHROMATOGRAPHY chromatography IN-ON on OSCAR-CM silica NN-CHEMENTITY gel -LRB- ( OSCAR-CM hexane DASH / OSCAR-CM Et2OÂ JJ =Â CD 2/1 -RRB- ) TO to VB-YIELD give CD 0.97 NN-MASS g IN-OF of CD 3 IN-AS as DT a JJ pale JJ yellow JJ viscous NN-STATE liquid -LRB- ( CD 95 NN-PERCENT % -RRB- ) STOP .