Patent ID: 7968736

Claim:
A compound of the following structure: wherein R 1 is H, an alkyl group, an aryl group, an alkenyl group, an alkynyl group, or a halogen atom; R 2 is H, an alkyl group, an aryl group, a benzyl group, a trityl group, —SiR a R b R c , CH 2 OR d , or COR e ; R a , R b and R c are independently an alkyl group or an aryl group; R d is an alkyl group, an aryl group, an alkoxylalkyl group, —R i SiR a R b R c or a benzyl group, wherein R i is an alkylene group; R e is an alkyl group, an allyl group, a benzyl group, an aryl group, an alkoxy group, or —NR g R h , wherein R g and R h are independently H, an alkyl group or an aryl group; R 3 is (CH 2 ) n where n is and integer in the range of 0 to 5, —CH 2 CH(CH 3 )—, —CH═CH—, —CH═C(CH 3 )—, or —C≡C—; R 4 wherein y1 and y2 are 1 and y3, y4 and y5 are independently 0 or 1, R k1 , R k2 , R k3 , R k4 and R k5 are independently H, CH 3 , or OR 2a , and R s1 , R s2 , R s3 , and R s4 are independently H or CH 3 , wherein R 2a is H, an alkyl group, an aryl group, a benzyl group, a trityl group, —SiR a R b R c , CH 2 OR d , or COR e ; and R 5 is H or OR 2b , wherein R 2b is H, an alkyl group, an aryl group, an aryl group, a benzyl group, a trityl group, —SiR a R b R c , CH 2 OR d , or COR e .