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CAS 83020-74-0
2,2,4,6,6-Pentamethyl-7,7a-dihydro-1,3-benzodioxol-5-one
Codes: Astaxanthin-020
Application context (from source-drug indications)
营养失调AstaxanthinKnee arthritisAstaxanthinDiabetic neuropathyAstaxanthinStrokeAstaxanthin
Source drugs (routes using this intermediate)
| Drug | Tier | Expiry |
|---|---|---|
| Astaxanthin | 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.
6-Hydroxy-3-[(1E)-3-hydroxy-3-methylpenta-1,4-dien-1-yl]-2,4,4-trimethylcyclohex-2-en-1-one→Acetylene→1-Buten-3-one→Lithium 3-methylpent-1-en-4-yn-3-olate→Dilithium 3-methylpent-4-en-1-yn-1-id-3-olate→2,2,4,6,6-Pentamethyl-7,7a-dihydro-1,3-benzodioxol-5-one→Dilithium 2,2,4,6,6-pentamethyl-5-(3-methyl-3-oxidopent-4-en-1-yn-1-yl)-5,6,7,7a-tetrahydro-2H-1,3-benzodioxol-5-olate→6-Hydroxy-3-(3-hydroxy-3-methylpent-4-en-1-yn-1-yl)-2,4,4-trimethylcyclohex-2-en-1-one→6-Hydroxy-3-[(1E)-3-hydroxy-3-methylpenta-1,4-dien-1-yl]-2,4,4-trimethylcyclohexa-2,5-dien-1-one
3-[(1E,3E)-5-Bromo-3-methylpenta-1,3-dien-1-yl]-6-hydroxy-2,4,4-trimethylcyclohex-2-en-1-one→2,2,4,6,6-Pentamethyl-7,7a-dihydro-1,3-benzodioxol-5-one→2,2,5,5,7-Pentamethyl-6-methylidene-3a,4,5,6-tetrahydro-2H-1,3-benzodioxole→(2E)-4-Bromo-1,1-dimethoxy-2-methylbut-2-ene→6-[5-Bromo-2-methoxy-3-methylpent-3-en-1-yl]-7a-methoxy-2,2,5,5,7-pentamethyl-3a,4,5,7a-tetrahydro-2H-1,3-benzodioxole→Isoprene monoxide→(2E)-4-Bromo-2-methylbut-2-enal
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