Patent ID: 6028206
Filing Date: 2000-02-22
Classification: C07D

Abstract:
An improved process for the production of important taxol analogues 10-deacetyl taxol A,B and C of the formula (2) ##STR5## R=C.sub.6 H.sub.5 (10 deacetyl taxol A) =CH.sub.3 C.dbd.CHCH.sub.3 (10-deacetyl taxol B)=C.sub.5 H.sub.11 (10-deacetyl taxol C)where R represents C.sub.6 H.sub.5 (10-deacetyl taxol A) or, CH.sub.3 C.dbd.CHCH.sub.3 (10-deacetyl taxol B) or, C.sub.5 H.sub.11 (10-deacetyl taxol C) which comprises (a) dissolving the taxol analogues 7-xylosyl-10-deacetyl taxol A,B,C of the formula (1) ##STR6## R=C.sub.6 H.sub.5 (10 deacetyl taxol A) =CH.sub.3 C.dbd.CHCH.sub.3 (10-deacetyl taxol B)=C.sub.5 H.sub.11 (10-deacetyl taxol C)where R represents C.sub.6 H.sub.5 (taxol analogue A or xyloside A), or CH.sub.3 C.dbd.CHCH.sub.3 (taxol analogue B or xyloside B) or C.sub.5 H.sub.11 (taxol analogue C or xyloside C) in a polar solvent (b) reacting the resultant solution with periodate for 20-40 hours at 20-40.degree. C. to cleave the diol system of the xyloside into dialdehyde, (c) treating the generated dialdehyde in a mixture of polar solvent-organic acid mixture with salts of amines at 0-40.degree. C. for 12-18 hours and (d) isolating the 10-deacetyl taxol A,B,C by chromatography.