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CAS 121289-20-1
(((1R,2S,4R,6R)-1-methyl-7-oxabicyclo[4.1.0]heptane-2,4-diyl)bis(oxy))bis(tert-butyldimethylsilane)
Codes: MAXA-020
Application context (from source-drug indications)
Secondary hyperparathyroidismMaxacalcitolHyperparathyroidismMaxacalcitol
Source drugs (routes using this intermediate)
| Drug | Tier | Expiry |
|---|---|---|
| Maxacalcitol | 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.
4-((S)-1-((1S,3aS,7aS,E)-4-((Z)-2-((3S,5R)-3,5-bis((tert-butyldimethylsilyl)oxy)-2-methylenecyclohexylidene)ethylidene)-7a-methyloctahydro-1H-inden-1-yl)ethoxy)-2-methylbutan-2-ol→(R)-2-methyl-5-(prop-1-en-2-yl)cyclohex-2-en-1-one→(1R,4R,6R)-1-methyl-4-(prop-1-en-2-yl)-7-oxabicyclo[4.1.0]heptan-2-one→(1S,2S,4S,6R)-1-methyl-4-(prop-1-en-2-yl)-7-oxabicyclo[4.1.0]heptan-2-ol→(1R,3S,5S,6S)-5-hydroxy-6-methyl-7-oxabicyclo[4.1.0]heptan-3-yl acetate→(1S,2S,4S,6R)-1-methyl-7-oxabicyclo[4.1.0]heptane-2,4-diol→(((1R,2S,4R,6R)-1-methyl-7-oxabicyclo[4.1.0]heptane-2,4-diyl)bis(oxy))bis(tert-butyldimethylsilane)→(3S,5S)-3,5-bis((tert-butyldimethylsilyl)oxy)-6-oxoheptanal→(3S,5R)-8,8-dibromo-3,5-bis((tert-butyldimethylsilyl)oxy)oct-7-en-2-one→N-(5-chloropyridin-2-yl)-1,1,1-trifluoro-N-((trifluoromethyl)sulfonyl)methanesulfonamide→(3S,5R)-3,5-bis((tert-butyldimethylsilyl)oxy)oct-1-en-7-yn-2-yl trifluoromethanesulfonate→methyl 2-((3S,5R)-3,5-bis((tert-butyldimethylsilyl)oxy)-2-methylenecyclohexylidene)acetate→methyl (Z)-2-((3S,5R)-3,5-bis((tert-butyldimethylsilyl)oxy)-2-methylenecyclohexylidene)acetate→(Z)-2-((3S,5R)-3,5-bis((tert-butyldimethylsilyl)oxy)-2-methylenecyclohexylidene)ethan-1-ol→((Z)-2-((3S,5R)-3,5-bis((tert-butyldimethylsilyl)oxy)-2-methylenecyclohexylidene)ethyl)diphenylphosphine oxide→ethyl 3-((S)-1-((1S,3aR,7aR)-7a-methyl-4-oxooctahydro-1H-inden-1-yl)ethoxy)propanoate→ethyl 3-((S)-1-((1S,3aS,7aS,E)-4-((Z)-2-((3S,5R)-3,5-bis((tert-butyldimethylsilyl)oxy)-2-methylenecyclohexylidene)ethylidene)-7a-methyloctahydro-1H-inden-1-yl)ethoxy)propanoate→(1R,3aR,4S,7aR)-1-((S)-1-hydroxypropan-2-yl)-7a-methyloctahydro-1H-inden-4-ol→(S)-2-((1R,3aR,4S,7aR)-4-hydroxy-7a-methyloctahydro-1H-inden-1-yl)propyl 4-methylbenzenesulfonate→(S)-2-((1R,3aR,4S,7aR)-4-((tert-butyldimethylsilyl)oxy)-7a-methyloctahydro-1H-inden-1-yl)propyl 4-methylbenzenesulfonate→tert-butyldimethyl(((1R,3aR,4S,7aR)-7a-methyl-1-(prop-1-en-2-yl)octahydro-1H-inden-4-yl)oxy)silane→1-((1S,3aR,4S,7aS)-4-((tert-butyldimethylsilyl)oxy)-7a-methyloctahydro-1H-inden-1-yl)ethan-1-one→(S)-1-((1S,3aR,4S,7aR)-4-((tert-butyldimethylsilyl)oxy)-7a-methyloctahydro-1H-inden-1-yl)ethan-1-ol→ethyl propiolate→ethyl (E)-3-((S)-1-((1S,3aR,4S,7aR)-4-((tert-butyldimethylsilyl)oxy)-7a-methyloctahydro-1H-inden-1-yl)ethoxy)acrylate→ethyl 3-((S)-1-((1S,3aR,4S,7aR)-4-((tert-butyldimethylsilyl)oxy)-7a-methyloctahydro-1H-inden-1-yl)ethoxy)propanoate→ethyl 3-((S)-1-((1S,3aR,4S,7aS)-4-hydroxy-7a-methyloctahydro-1H-inden-1-yl)ethoxy)propanoate
Intermediates available on this site
Side-by-side comparison of all listed offers on this CAS; price bands are list-price ranges, final price subject to RFQ confirmation.
| Supplier | Product | Price band | MOQ | Lead time | Qualifications | Action |
|---|---|---|---|---|---|---|
| Qualified Partner — East China API Works | PHOSPHINE OXIDE, [2-[3,5-BIS [[(1,1-DIMETHYLETHYL) DIMETHYLSILY]OXY]-2-METHYLENECYCLOHEXYLIDENE]ETHYL]DIPHENYL-,[3S-(1Z,3A,5B0)] Pharmaceutical Intermediates | On request | On request | On request | — | |
| Unibest Nantong cGMP Site | (1S,3aR,4S,7aS)-1-((S)-1-(3-hydroxy-3-methylbutoxy)ethyl)-7a-methyloctahydro-1H-inden-4-ol Pharmaceutical Intermediates | On request | On request | On request | — | |
| Unibest Taizhou GMP-like Site | (1S,3aR,7aR)-1-((S)-1-(3-hydroxy-3-Methylbutoxy)ethyl)-7a-Methylhexahydro-1H-inden-4(2H)-one Pharmaceutical Intermediates | On request | On request | On request | — | |
| Qualified Partner — East China API Works | (1S,3aR,7aR)-Octahydro-7a-Methyl-1-((1S)-1-(3-Methyl-3-((triMethylsilyl)oxy)butoxy)ethyl)-4H-Inden-4-one Pharmaceutical Intermediates | On request | On request | On request | — | |
| Unibest Nantong cGMP Site | (Z)-2-((3S,5R)-3,5-bis((tert-butyldiMethylsilyl)oxy)-2-Methylenecyclohexylidene)ethanol Pharmaceutical Intermediates | On request | On request | On request | — |
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