al 2 o 3 act i 1 1 c 6 h 6 petroleum ether under 5 psi fractions 2 6 100 ml ea were concentrated to give an orange oil which was dissolved in 200 ml petroleum ether containing ca 10 ml et 2 o after standing at room temperature 4 days compound 4d precipitated as a white powder four crops yielded 6 2 g 26 mp 127 u00b0 128 u00b0 c nmr 300 mhz u03b47 39 and 6 82 aa 39 bb 39 c 4h j 8 5 hz arh 7 36 to 7 25 m 5h c 6 h 5 7 19 and 6 80 aa 39 bb 39 c 4h j 8 5 hz arh 6 91 and 6 74 aa 39 bb 39 c 4h j 8 5 hz arh 4 92 s 2h och 2 ph 3 70 s 3h och 3 3 69 s 3h och 3 3 47 s 1h cyclopropyl h anal c 30 h 26 cl 2 o 3 c h cl this compound readily decomposes in solution with evolution of hcl gas on contact with scratched sintered or ground glass 1 1 2 tris 4 methoxyphenyl ethene 10 g 29 mmol prepared in example 7 and 0 5 g of teba 2 2 mmol were dissolved in 68 ml chcl 3 and treated dropwise with 53 ml of chilled 50 naoh the mixture was stirred at room temperature 48 h 100 ml ch 2 cl 2.