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CAS 155681-72-4
(1S,2S,5R,7S,8S)-7-[(tert-butyldimethylsilyl)oxy]-2-hydroxy-8-methyl-4-oxatricyclo[6.4.0.0(2,5)]dodec-9-en-11-one
Codes：(X)101438-16-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.
(4'aS,5'S)-4'a-methyl-3',4',4'a,5',6',7'-hexahydro-1'H-spiro[1,3-dioxolane-2,2'-naphthalene]-5'-ol→[(4'aS,5'S)-4'a-methyl-3',4',4'a,5',6',7'-hexahydro-1'H-spiro[1,3-dioxolane-2,2'-naphthalene]-5'-yloxy](tert-butyl)dimethylsilane→(4'aS,5'S,8'aS)-5'-[(tert-butyldimethylsilyl)oxy]-4'a-methyl-octahydro-1'H-spiro[1,3-dioxolane-2,2'-naphthalene]-8'-one→(4'aS,5'S,8'aS)-5'-[(tert-butyldimethylsilyl)oxy]-4'a-methyl-3',4',4'a,5',6',8'a-hexahydro-1'H-spiro[1,3-dioxolane-2,2'-naphthalene]-8'-yl trifluoromethanesulfonate→(1S,2S,5R,7S,8S)-7-[(tert-butyldimethylsilyl)oxy]-2-hydroxy-8-methyl-4-oxatricyclo[6.4.0.0(2,5)]dodecan-11-one→methyl (4'aS,5'S,8'aS)-5'-[(tert-butyldimethylsilyl)oxy]-4'a-methyl-3',4',4'a,5',6',8'a-hexahydro-1'H-spiro[1,3-dioxolane-2,2'-naphthalene]-8'-carboxylate→(4'aS,5'S,8'aR)-5'-[(tert-butyldimethylsilyl)oxy]-4'a-methyl-3',4',4'a,5',6',8'a-hexahydro-1'H-spiro[1,3-dioxolane-2,2'-naphthalene]-8'-ylmethanol→(4'aS,5'S,7'R,8'S,8'aS)-5'-[(tert-butyldimethylsilyl)oxy]-8'-(hydroxymethyl)-4'a-methyl-octahydro-1'H-spiro[1,3-dioxolane-2,2'-naphthalene]-7',8'-diol→(1'S,2'S,5'R,7'S,8'S)-7'-[(tert-butyldimethylsilyl)oxy]-8'-methyl-4'-oxaspiro[1,3-dioxolane-2,11'-tricyclo[6.4.0.0(2,5)]dodecane]-2'-ol→(1S,2S,5R,7S,8S)-7-[(tert-butyldimethylsilyl)oxy]-2-hydroxy-8-methyl-4-oxatricyclo[6.4.0.0(2,5)]dodec-9-en-11-one→(1S,2S,5R,7S,8S)-2,7-bis[(tert-butyldimethylsilyl)oxy]-8-methyl-4-oxatricyclo[6.4.0.0(2,5)]dodec-9-en-11-one→(1S,2S,3S,4S,6R)-1,4-bis[(tert-butyldimethylsilyl)oxy]-3-methyl-7-oxabicyclo[4.2.0]octane-2,3-dicarbaldehyde→(1S,2S,3S,4S,6R)-1,4-bis[(tert-butyldimethylsilyl)oxy]-2-(1,3-dioxolan-2-yl)-3-methyl-7-oxabicyclo[4.2.0]octane-3-carbaldehyde→[2-(2,4-dimethylpenta-1,3-dien-3-yl)-1,3-dithian-2-yl]lithium→(1'S,3'S,4'S,7'R,9'S,10'S)-4',9'-bis[(tert-butyldimethylsilyl)oxy]-1'-(methoxymethoxy)-10',14',17',17'-tetramethyl-6'-oxaspiro[1,3-dithiane-2,12'-tetracyclo[11.3.1.0(3,10).0(4,7)]heptadecan]-13'-ene-2',11'-dione→tert-butyl({[(1S,2S,3S,4S,6R)-4-[(tert-butyldimethylsilyl)oxy]-3-{[2-(2,4-dimethylpenta-1,3-dien-3-yl)-1,3-dithian-2-yl]carbonyl}-2-(1,3-dioxolan-2-yl)-3-methyl-7-oxabicyclo[4.2.0]octan-1-yl]oxy})dimethylsilane→(1S,2S,3S,4S,6R)-1,4-bis[(tert-butyldimethylsilyl)oxy]-3-{[2-(2,4-dimethylpenta-1,3-dien-3-yl)-1,3-dithian-2-yl]carbonyl}-3-methyl-7-oxabicyclo[4.2.0]octane-2-carbaldehyde→1-lithio-1-(methoxymethoxy)ethene→1-[(1S,2S,3S,4S,6R)-1,4-bis[(tert-butyldimethylsilyl)oxy]-3-{[2-(2,4-dimethylpenta-1,3-dien-3-yl)-1,3-dithian-2-yl]carbonyl}-3-methyl-7-oxabicyclo[4.2.0]octan-2-yl]-2-(methoxymethoxy)prop-2-en-1-one→1,2-Dihydroxyethane
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