56492-98-9

Upstream product

• 39589-98-5 endo-bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic dimethyl ester 
• 39762-43-1 3,4-Bis(trimethylsiloxy)-endo-tricyclo(4.2.1.0^2,5and)nona-3,7-dien 
• 98-59-9 p-toluenesulfonyl chloride 

Downstream Products

• 93970-30-0 3,3-Dichlor-4'-(p-toluolsulfonyloxy)spiro2,5>non-7-en>-4-on 

Relevant academic research and scientific papers

The Behaviour of (1α,2α,5α,6α)-3,4-Bis(trimethylsilyloxy)tricyclo2,5>nona-3,7-diene on Treatment with Oxidative Reagents

(1α,2α,5α,6α)-3,4-Bis(trimethylsilyloxy)tricyclo2,5>nona-3,7-diene (1) is treated with different oxidative reagents.The reaction with halogens (Br2, Cl2) primarily yields the cyclobutanedione 2 which adds a second mole of halogen at the olefinic double bond.The adduct 3 is stabilized by forming 4a with an intramolecular ether bridge.Addition of chlorine to 2 directly yields 4b. - Reaction of 1 with DMSO/Ac2O or Cu(II) acetate in acetic acid causes an oxidative dimerization to yield 5 or 6, respectively.In the case of Cu(II) acetate the anhydride 7 is obtained as a second product.