chcoor cr u2550 cr u2014 coor cn h i nh 2 nhr nr 2 sr br cl f no 2 n u2550 c u2550 o n u2550 c u2550 s cf 3 where r straight or branched chain alkyl with up to 12 c atoms as shown in scheme 1 below u201c a u201d may include aryl biphenyl polyphenyl cyclohexyl cyclohexenyl dioxolane bridged bicyclic pyridine pyrimidine pyrazine pyridazine and tetrazine groups as shown in scheme 2 below and u201c x u201d is a linking group between two rings and may include ch u2550 nr ch u2550 chr u2032 n u2550 n coo cos conh ch 2 n n u2550 c u2550 n o ch 2 o ch 2 nh nh n o u2212 u2550 n n u2550 ch u2014 ch u2550 n coo ch 2 nooc ch 2 coo as shown in scheme 3 below a method for preparation of compounds with z coor coh ch 2 oh and rch u2550 crr u2032 is illustrated in scheme 4 below a carboxylic acid bearing group z is reacted with sf 4 to obtain the cf 3 u2014 product which is reacted with a hydride such as lialh 4 to obtain the alcohol z ch 2 oh oxidation of the alcohol furnished the aldehyde z coh a wittig reaction of the aldehyde with alkyl triphenylphosphine and base afforded the olefin z rch u2550 crr u2032 further transformations of the ester functionality z coor can be carried out to.