Patent ID: 8481746

Claim:
A compound of the general Formula I: wherein: n is an integer from 1 to 4; R 1 -R 4 are each independently selected from the group consisting of hydrogen, alkyl, cycloalkyl, aryl, heteroaryl, heteroalicyclic, alkoxy, thioalkoxy, hydroxy, thiol, amine, nitro and cyano; R 5 is a leaving group capable of being dissociated so as to form a carbanion; D 1 is an electron donating group of the general Formula IIa: Z 1 Z 2 Xa Formula IIa; and D 2 is an electron donating group of the general Formula IIb: Z 3 Z 4 Xb Formula IIb; whereas: Xa and Xb are each independently an electron donating atom; and Z 1 , Z 2 , Z 3 and Z 4 are each independently absent or a substituent selected from the group consisting of substituted or non-substituted aryl, substituted or non-substituted alkyl, substituted or non-substituted alkoxy and substituted or non-substituted aryloxy, or, alternatively, at least two of Z 1 , Z 2 , R 1 and R 2 and/or at least two of Z 3 , Z 4 , R 3 and R 4 from together a five- or six-membered heteroalicyclic or heteroaromatic ring, wherein each of said electron donating atoms Xa and Xb is independently selected from the group consisting of phosphorous, sulfur, nitrogen and carbon, said carbon being a carbene that forms a part of a N-heteroalicyclic or a N-heteroaryl, and wherein at least one of said D 1 and D 2 having said general Formula IIa or IIb, respectively, is being such that said electron donating atom is phosphorus and either said Z 1 and Z 2 or said Z 3 and Z 4 substituents of said phosphorous are each independently a substituted or non-substituted aryl.