Process for the preparation of chromogenic cryptahemispherands

Details Process for the preparation of chromogenic cryptahemispherands Process for the preparation of chromogenic cryptahemispherands

C - Chemistry, Metallurgy

07

D

260/237.2

C07D 498/08 (2006.01)

Patent

CA 1316174

ABSTRACT OF THE DISCLOSURE The invention relates to a process in which a variety of cryptahemispherands bearing a chromogenic group attached to the partially preorganized moiety may be synthesized. The procedure of the present invention allows preparation of preferred chromogenic cryptanhemispherands of the general formula: Image wherein: R, is same or different, is hydrogen, lower alkyl, lower alkylidene, lower alkenyl, allyl, aryl or benzyl; R', same or different, is lower alkyl, lower alkylidene, lower alkenyl, allyl, aryl, or benzyl; R", same or different, is hydrogen, lower alkyl, lower alkylidene, lower alkenyl, allyl, aryl, or benzyl; Z is halogen, Y is an electron withdrawing group, e.g., CN, NO2, CF3, COOR; m is 1 to about 3; n is 1 to about 3; a is 1 to about 3; b is 1 to about 3; k is 1 to about 3; l is 1 to about 3; and x is 2 to 4.

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