Acetone solvate of dimethoxy docetaxel and its process of preparation
DC CAFCFirst Claim
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1. An acetone solvate of 4-acetoxy-2α
- -benzoyloxy-5β
,20-epoxy-1-hydroxy-7β
,10β
-dimethoxy-9-oxotax-11-en-13α
-yl (2R,3S)-3-tert-butoxycarbonylamino-2-hydroxy-3-phenylpropionate.
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Abstract
This invention discloses and claims an acetone solvate of dimethoxydocetaxel or 4-acetoxy-2α-benzoyloxy-5β,20-epoxy-1-hydroxy-7β,10β-dimethoxy-9-oxotax-11-en-13α-yl (2R,3S)-3-tert-butoxycarbonylamino-2-hydroxy-3-phenylpropionate and its preparation by crystallization from an aqueous/acetone solution.
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16 Claims
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1. An acetone solvate of 4-acetoxy-2α
- -benzoyloxy-5β
,20-epoxy-1-hydroxy-7β
,10β
-dimethoxy-9-oxotax-11-en-13α
-yl (2R,3S)-3-tert-butoxycarbonylamino-2-hydroxy-3-phenylpropionate.
- -benzoyloxy-5β
-
2. An acetone solvate of 4-acetoxy-2α
- -benzoyloxy-5β
,20-epoxy-1-hydroxy-7β
,10β
-dimethoxy-9-oxotax-11-en-13α
-yl (2R,3S)-3-tert-butoxycarbonylamino-2-hydroxy-3-phenylpropionate comprising from about 5 to about 7 percent by weight of acetone.
- -benzoyloxy-5β
-
3. A process for the preparation of the acetone solvate of 4-acetoxy-2α
- -benzoyloxy-5β
,20-epoxy-1-hydroxy-7β
,10β
-dimethoxy-9-oxotax-11-en-13α
-yl (2R,3S)-3-tert-butoxycarbonylamino-2-hydroxy-3-phenylpropionate, which comprises;crystallizing 4-acetoxy-2α
-benzoyloxy-5β
,20-epoxy-1-hydroxy-7β
,10β
-dimethoxy-9-oxotax-11-en-13α
-yl (2R,3S)-3-tert-butoxycarbonylamino-2-hydroxy-3-phenylpropionate from a mixture of water and acetone, which comprises seeding the solution with a suspension of said product in an acetone/water mixture and then subsequently treating with water, and which comprises drying the product obtained under reduced pressure. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- -benzoyloxy-5β
Specification