1 3 m 6 ch 2 1 0 d 3 ch 3 analysis required c 20 69 14 h 29 8 41 n 4 03 actual c 69 25 h 8 48 n 4 09 title free acid was liberated by treating the salt of the preceding example 0 0288 mole in methylene chloride 100 ml with 20 aqueous hcl 50 ml vigorously stirred for 1 0 hour the layers were separated and the aqueous extracted with fresh methylene chloride the combined organic layers were washed with 1n hcl and brine drying and stripping under reduced pressure gave title product as a colorless oil which crystallized on standing 94 yield mp 57 u00b0 60 u00b0 ir kbr 1704 cm 1 alpha d 25 24 95 u00b0 c 1 04 ch 2 cl 2 pnmr cdcl 3 tms delta 6 2 m 2 olefinic ch 3 5 s 3 och 3 2 85 t 1 c 2 h 2 6 m 1 c 4 h 2 0 1 5 m 6 ch 2 in a reactor equipped with reflux condenser and n 2 atmosphere the resolved endo acid of the preceding example 0 0247 mole p toluenesulfonic acid 2 47 mmole and ethanol 60 ml were combined and refluxed for 20 hours the reaction mixture was stripped under reduced pressure to a yellow oil which was partitioned between h 2 o and methylene chloride the separated organic layer was washed with saturated aqueous sodium bicarbonate 1n hcl and brine drying and stripping under reduced pressure gave title product as a light yellow oil in 80 yield pnmr cdcl 3 tms delta 6 1.