SYNTHESIS OF CARMINIC ACID AND PRINCIPAL INTERMEDIATES

摘要

PCT No. PCT/GB91/01170 Sec. 371 Date Mar. 17, 1993 Sec. 102(e) Date Mar. 17, 1993 PCT Filed Jul. 15, 1991 PCT Pub. No. WO92/01664 PCT Pub. Date Feb. 6, 1992.The invention relates to the synthesis of 6-deoxykermesates, 6-deoxykermesic acid, and carminic acid, based on a reaction of a 2-halogenonapthazarin with a bis-trimethylsilyl-diene.