Ethynylbenzenes

Details Ethynylbenzenes Ethynylbenzenes

C - Chemistry, Metallurgy

07

C

260/653.2, 260/6

C07C 15/12 (2006.01) C07C 15/50 (2006.01) C07C 17/25 (2006.01) C07C 29/143 (2006.01) C07C 41/24 (2006.01) C07C 43/20 (2006.01) C07C 43/215 (2006.01) C07C 45/46 (2006.01) C07C 45/63 (2006.01) C07C 49/792 (2006.01)

Patent

CA 1113125

A B S T R A C T There is disclosed a novel process for preparing anti-inflammatory ethynylbenzene derivatives represented by the general formula I: Image I wherein Y is hydrogen, halogen or loweralkyl of 1 to 3 carbon atoms; R may stand for a ring of the structure: Image wherein x is 1 to 3, or a ring of the structure: Image wherein Y' is hydrogen. halogen. loweralkyl of 1-3 carbon atoms and loweralkoxy of 1-3 carbon atoms; Y" is hydrogen or halogen; and Y''' is hydrogen or halogen, provided Y, Y', Y" and Y''' are not all hydrogen at the same time, by reacting a benzyl alcohol of formula V: Image V with a sulfonyl chloride, reducing the sulfonate VI of the formula: Image VI and dehydrohalogenating the formed .beta.-halostyrene of the formula VII: Image VII

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