← Back to patent-cliff list
CAS 158722-22-6
(4S,5R)-2,4-Diphenyl-4,5-dihydro-1,3-oxazole-5-carboxylic acid
Codes：(III)101438-25-a、(III)101438-26-a、(III)101438-27-a、(V)101438-33-a
Application context (from source-drug indications)
乳腺癌Paclitaxel/Encequidar mesylate腺癌Paclitaxel/Encequidar mesylate血管肉瘤Paclitaxel/Encequidar mesylate实体瘤Paclitaxel/Encequidar mesylate
Source drugs (routes using this intermediate)
| Drug | Tier | Expiry |
|---|---|---|
| Paclitaxel/Encequidar mesylatePaclitaxel/Encequidar mesylate | Tier C — Watch / trade | - |
Position in synthesis routes (up/downstream chain)
Ordered by route registration; left → right is the synthesis direction. The highlighted node is the current CAS; others link to their own profiles.
(1S,2S,3R,4S,7R,9S,10S,12R,15S)-4,12-bis(acetyloxy)-2-(benzoyloxy)-1-hydroxy-10,14,17,17-tetramethyl-11-oxo-9-{[(2,2,2-trichloroethoxy)carbonyl]oxy}-6-oxatetracyclo[11.3.1.0(3,10).0(4,7)]heptadec-13-en-15-yl (4S,5R)-2,4-diphenyl-4,5-dihydro-1,3-oxazole-5-carboxylate→(2alpha,5beta,7beta,10beta,13alpha)-4,10-Bis(acetyloxy)-1,13-dihydroxy-9-oxo-7-[[(2,2,2-trichloroethoxy)carbonyl]oxy]-5,20-epoxytax-11-en-2-yl benzoate→(2alpha,5beta,7beta,10beta,13alpha)-4,10-Bis(acetyloxy)-1,7,13-trihydroxy-9-oxo-5,20-epoxytax-11-en-2-yl benzoate→(4S,5R)-2,4-Diphenyl-4,5-dihydro-1,3-oxazole-5-carboxylic acid
(2alpha,5beta,7beta,10beta,13alpha)-4,10-Bis(acetyloxy)-1,7,13-trihydroxy-9-oxo-5,20-epoxytax-11-en-2-yl benzoate→(4S,5R)-2,4-Diphenyl-4,5-dihydro-1,3-oxazole-5-carboxylic acid→(1S,2S,3R,4S,7R,9S,10S,12R,15S)-4,12-bis(acetyloxy)-9-{[(benzyloxy)carbonyl]oxy}-1,15-dihydroxy-10,14,17,17-tetramethyl-11-oxo-6-oxatetracyclo[11.3.1.0(3,10).0(4,7)]heptadec-13-en-2-yl benzoate→(1S,2S,3R,4S,7R,9S,10S,12R,15S)-4,12-bis(acetyloxy)-2-(benzoyloxy)-9-{[(benzyloxy)carbonyl]oxy}-1-hydroxy-10,14,17,17-tetramethyl-11-oxo-6-oxatetracyclo[11.3.1.0(3,10).0(4,7)]heptadec-13-en-15-yl (4S,5R)-2,4-diphenyl-4,5-dihydro-1,3-oxazole-5-carboxylate
(2alpha,5beta,7beta,10beta,13alpha)-4,10-Bis(acetyloxy)-1,7,13-trihydroxy-9-oxo-5,20-epoxytax-11-en-2-yl benzoate→(4S,5R)-2,4-Diphenyl-4,5-dihydro-1,3-oxazole-5-carboxylic acid→(1S,2S,3R,4S,7R,9S,10S,12R,15S)-4,12-bis(acetyloxy)-9-{[(tert-butoxy)carbonyl]oxy}-1,15-dihydroxy-10,14,17,17-tetramethyl-11-oxo-6-oxatetracyclo[11.3.1.0(3,10).0(4,7)]heptadec-13-en-2-yl benzoate→(1S,2S,3R,4S,7R,9S,10S,12R,15S)-4,12-bis(acetyloxy)-2-(benzoyloxy)-9-{[(tert-butoxy)carbonyl]oxy}-1-hydroxy-10,14,17,17-tetramethyl-11-oxo-6-oxatetracyclo[11.3.1.0(3,10).0(4,7)]heptadec-13-en-15-yl (4S,5R)-2,4-diphenyl-4,5-dihydro-1,3-oxazole-5-carboxylate
(2alpha,5beta,7beta,10beta,13alpha)-4-(Acetyloxy)-1,7,10,13-tetrahydroxy-9-oxo-5,20-epoxytax-11-en-2-yl benzoate→dichlorodiethylsilane→(1S,2S,3R,4S,7R,9S,10S,12R,15S)-4-(acetyloxy)-9-{[diethyl(methoxy)silyl]oxy}-1,12,15-trihydroxy-10,14,17,17-tetramethyl-11-oxo-6-oxatetracyclo[11.3.1.0(3,10).0(4,7)]heptadec-13-en-2-yl benzoate→(1S,2S,3R,4S,7R,9S,10S,12R,15S)-4,12-bis(acetyloxy)-9-{[diethyl(methoxy)silyl]oxy}-1,15-dihydroxy-10,14,17,17-tetramethyl-11-oxo-6-oxatetracyclo[11.3.1.0(3,10).0(4,7)]heptadec-13-en-2-yl benzoate→(4S,5R)-2,4-Diphenyl-4,5-dihydro-1,3-oxazole-5-carboxylic acid→(1S,2S,3R,4S,7R,9S,10S,12R,15S)-4,12-bis(acetyloxy)-2-(benzoyloxy)-9-{[diethyl(methoxy)silyl]oxy}-1-hydroxy-10,14,17,17-tetramethyl-11-oxo-6-oxatetracyclo[11.3.1.0(3,10).0(4,7)]heptadec-13-en-15-yl (4S,5R)-2,4-diphenyl-4,5-dihydro-1,3-oxazole-5-carboxylate
Intermediates available on this site
No listed intermediates for this target yet — send an RFQ directly and it will enter our matching pool.
This is a CAS-level registry record: registrations across routes are merged. Supplier offers and buyer demands will be matched on this CAS as the primary key.