1(S),3(R)-bis(tertbutyldimethylsililoxy)-20-one-9,10-secopregna-5,7(E),10⁽¹⁹⁾-triene

Base Information

• Chemical Name: 1(S),3(R)-bis(tertbutyldimethylsililoxy)-20-one-9,10-secopregna-5,7(E),10⁽¹⁹⁾-triene
• CAS No.: 131711-71-2
• Molecular Formula: C₃₃H₅₈O₃Si₂
• Molecular Weight: 558.993

Synonyms:1(S),3(R)-bis(tertbutyldimethylsililoxy)-20-one-9,10-secopregna-5,7(E),10⁽¹⁹⁾-triene

Chemical Property of 1(S),3(R)-bis(tertbutyldimethylsililoxy)-20-one-9,10-secopregna-5,7(E),10⁽¹⁹⁾-triene

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Technology Process of 1(S),3(R)-bis(tertbutyldimethylsililoxy)-20-one-9,10-secopregna-5,7(E),10⁽¹⁹⁾-triene

There total 1 articles about 1(S),3(R)-bis(tertbutyldimethylsililoxy)-20-one-9,10-secopregna-5,7(E),10⁽¹⁹⁾-triene which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield:

(5E,7E)-(1S,3R,20S)-1,3-bis<<(1,1-dimethylethyl)dimethylsilyl>oxy>-20-methyl-9,10-secopregna-5,7,10(19)-trien-21-al (112828-13-4) → 1(S),3(R)-bis(tertbutyldimethylsililoxy)-20-one-9,10-secopregna-5,7(E),10(19)-triene (131711-71-2)

Guidance literature:

With 1,4-diaza-bicyclo[2.2.2]octane; copper diacetate; In N,N-dimethyl-formamide; at 37 - 43 ℃;

Reference yield:

1(S),3(R)-bis(tertbutyldimethylsililoxy)-20-one-9,10-secopregna-5,7(E),10(19)-triene (131711-71-2) → 1(S),3(R)-bis(tertbutyldimethylsililoxy)-22-oxa-25-hydroxy-9,10-secocholesta-5(Z),7(E),10(19)-triene (152517-44-7)

Guidance literature:

Multi-step reaction with 4 steps

1.1: ethanol; sodium tetrahydroborate / di-isopropyl ether / 4 h / 57 - 63 °C

2.1: sodium hydride / tetrahydrofuran / 19 - 25 °C

3.1: L-Selectride / tetrahydrofuran / 19 - 25 °C

3.2: 19 - 25 °C

4.1: triethylamine; 9-acetylanthracene / toluene / -5 - 5 °C

With sodium tetrahydroborate; 9-acetylanthracene; ethanol; L-Selectride; sodium hydride; triethylamine; In tetrahydrofuran; di-isopropyl ether; toluene;

Reference yield:

1(S),3(R)-bis(tertbutyldimethylsililoxy)-20-one-9,10-secopregna-5,7(E),10(19)-triene (131711-71-2) → 1,3-Diepi-1alpha,25-dihydroxy-22-oxavitamin D3

Guidance literature:

Multi-step reaction with 5 steps

1.1: ethanol; sodium tetrahydroborate / di-isopropyl ether / 4 h / 57 - 63 °C

2.1: sodium hydride / tetrahydrofuran / 19 - 25 °C

3.1: L-Selectride / tetrahydrofuran / 19 - 25 °C

3.2: 19 - 25 °C

4.1: triethylamine; 9-acetylanthracene / toluene / -5 - 5 °C

5.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 16 - 20 °C

With sodium tetrahydroborate; 9-acetylanthracene; ethanol; tetrabutyl ammonium fluoride; L-Selectride; sodium hydride; triethylamine; In tetrahydrofuran; di-isopropyl ether; toluene;

upstream raw materials:

(5E,7E)-(1S,3R,20S)-1,3-bis<<(1,1-dimethylethyl)dimethylsilyl>oxy>-20-methyl-9,10-secopregna-5,7,10(19)-trien-21-al

Downstream raw materials:

1(S),3(R)-bis(tertbutyldimethylsililoxy)-22-oxa-25-hydroxy-9,10-secocholesta-5(Z),7(E),10⁽¹⁹⁾-triene

1(S),3(R)-bis(tertbutyldimethylsililoxy)-20(S)-hydroxy-9,10-secopregna-5,7(E),10⁽¹⁹⁾-triene

1(S),3(R)-bis(tertbutyldimethylsililoxy)-22-oxa-25-hydroxy-9,10-secocholesta-5(E),7(E),10⁽¹⁹⁾-triene

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