ChemicalBook CAS DataBase List ((1R,3R,E)-5-((E)-2-((1R,3aS,7aR)-1-((2R,5R,E)-5,6-diMethylhept-3-en-2-yl)-7a-Methyldihydro-1H-inden-4(2H,5H,6H,7H,7aH)-ylidene)ethylidene)-4-Methylenecyclohexane-1,3-diyl)bis(oxy)bis(tert-butyldiMethylsilane)

((1R,3R,E)-5-((E)-2-((1R,3aS,7aR)-1-((2R,5R,E)-5,6-diMethylhept-3-en-2-yl)-7a-Methyldihydro-1H-inden-4(2H,5H,6H,7H,7aH)-ylidene)ethylidene)-4-Methylenecyclohexane-1,3-diyl)bis(oxy)bis(tert-butyldiMethylsilane) synthesis

4synthesis methods

Product Name:((1R,3R,E)-5-((E)-2-((1R,3aS,7aR)-1-((2R,5R,E)-5,6-diMethylhept-3-en-2-yl)-7a-Methyldihydro-1H-inden-4(2H,5H,6H,7H,7aH)-ylidene)ethylidene)-4-Methylenecyclohexane-1,3-diyl)bis(oxy)bis(tert-butyldiMethylsilane)
CAS Number:115540-28-8
Molecular formula:C40H72O2Si2
Molecular Weight:641.17

18162-48-6 Synthesis

18162-48-6
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((1R,3R,E)-5-((E)-2-((1R,3aS,7aR)-1-((2R,5R,E)-5,6-diMethylhept-3-en-2-yl)-7a-Methyldihydro-1H-inden-4(2H,5H,6H,7H,7aH)-ylidene)ethylidene)-4-Methylenecyclohexane-1,3-diyl)bis(oxy)bis(tert-butyldiMethylsilane)

115540-28-8
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Yield:-

Steps:

Multi-step reaction with 4 steps
1: 42 percent / imidazole / dimethylformamide / 1.5 h / 20 °C
2: sodium hydrogen carbonate / aq. ethanol / 1.5 h / Heating
3: N-methylmorpholine N-oxide monohydrate, selenium dioxide / CH₂Cl₂; methanol / 0.83 h / Heating
4: imidazole / dimethylformamide / 1.5 h / 20 °C

References:

Calverley [Tetrahedron,1987,vol. 43,# 20,p. 4609 - 4619,4609-4619]

87680-65-7 Synthesis

87680-65-7
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References

9,10-Secoergosta-5,7,10(19),22-tetraen-3-ol, (3β,5Z,7Z,22E)- (9CI)

247900-07-8
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115540-28-8
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References

87417-26-3 Synthesis

(1,1-Dimethylethyl)dimethyl[[(3β,6R,7E,22E)-6,19-sulfonyl-9,10-secoergosta-5(10),7,22-trien-3-yl]oxy]-silane

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115540-28-8
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References