Zerz-butyl ester

BUTYL CARBAMATE (Carbamic acid, ZerZ-butyl ester)... 

ZerZ-Butyl cyanoacetate [1116-98-9] M 141.2, b 40-42 /0.1mm, 54-56 /0.3mm, 90 /10mm, 107-108 /23mm, d 0.989, 0 1.4198. The IR spectrum of a film should have bands at 1742 (ester CO) and 2273 (C=N) but not OH band (ca 3500 broad) cm . If it does not have the last named band then fractionally dist, otherwise dissolve in Et2O, wash with satd aq NaHCO3, dry over K2CO3, evap Et2O, and dist residue under a vacuum (see tert-butyl ethyl malonate for precautions to avoid decomposition during distn). [JCS 423 7955 HCA 42 1214 7959]. 

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