Technology Process of (2S,3S,8aR)-2-Benzyloxymethyl-5-(3,4-dimethoxy-benzyloxymethyl)-3-hydroxy-2,6,6-trimethyl-2,3,6,7,8,8a-hexahydro-chromen-4-one
There total 18 articles about (2S,3S,8aR)-2-Benzyloxymethyl-5-(3,4-dimethoxy-benzyloxymethyl)-3-hydroxy-2,6,6-trimethyl-2,3,6,7,8,8a-hexahydro-chromen-4-one 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:
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444809-24-9
(2S,3S,8aR)-2-Benzyloxymethyl-5-(3,4-dimethoxy-benzyloxymethyl)-3-hydroxy-2,6,6-trimethyl-2,3,6,7,8,8a-hexahydro-chromen-4-one
- Guidance literature:
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With
hydrogenchloride;
In
isopropyl alcohol;
at 0 - 20 ℃;
for 3h;
DOI:10.1021/ol026159t
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444809-24-9
(2S,3S,8aR)-2-Benzyloxymethyl-5-(3,4-dimethoxy-benzyloxymethyl)-3-hydroxy-2,6,6-trimethyl-2,3,6,7,8,8a-hexahydro-chromen-4-one
- Guidance literature:
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Multi-step reaction with 5 steps
1.1: 95 percent / NaH / tetrahydrofuran / 8 h / 20 °C
2.1: t-BuLi / diethyl ether / 0.5 h / -78 °C
2.2: 60 percent / TMEDA / 0.5 h / -78 °C
3.1: 90 percent / Dess-Martin periodinane; NaHCO3 / CH2Cl2 / 2 h / 20 °C
4.1: 90 percent / TBAF / tetrahydrofuran / 0.5 h / 0 °C
5.1: 77 percent / aq. HCl / propan-2-ol / 3 h / 0 - 20 °C
With
hydrogenchloride; tetrabutyl ammonium fluoride; tert.-butyl lithium; sodium hydride; sodium hydrogencarbonate; Dess-Martin periodane;
In
tetrahydrofuran; diethyl ether; dichloromethane; isopropyl alcohol;
DOI:10.1021/ol026159t
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-
444809-24-9
(2S,3S,8aR)-2-Benzyloxymethyl-5-(3,4-dimethoxy-benzyloxymethyl)-3-hydroxy-2,6,6-trimethyl-2,3,6,7,8,8a-hexahydro-chromen-4-one
- Guidance literature:
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Multi-step reaction with 11 steps
1.1: 78 percent / n-BuLi / tetrahydrofuran / 0.5 h / -78 °C
2.1: 90 percent / PCC / CH2Cl2 / 12 h / 20 °C
3.1: 60 percent / pyridinium tribromide; pyridine / CH2Cl2 / 20 h / 20 - 40 °C
4.1: 92 percent / (S)-CBS; BH3*THF / tetrahydrofuran / 2 h / 20 °C
5.1: 85 percent / imidazole / dimethylformamide / 2 h / 20 - 40 °C
6.1: 70 percent / MgBr2*Et2O; BuSH / diethyl ether / 12 h / 20 °C
7.1: 95 percent / NaH / tetrahydrofuran / 8 h / 20 °C
8.1: t-BuLi / diethyl ether / 0.5 h / -78 °C
8.2: 60 percent / TMEDA / 0.5 h / -78 °C
9.1: 90 percent / Dess-Martin periodinane; NaHCO3 / CH2Cl2 / 2 h / 20 °C
10.1: 90 percent / TBAF / tetrahydrofuran / 0.5 h / 0 °C
11.1: 77 percent / aq. HCl / propan-2-ol / 3 h / 0 - 20 °C
With
pyridine; 1H-imidazole; hydrogenchloride; n-butyllithium; borane-THF; (S)-diphenylprolinol; n-butanethiol; tetrabutyl ammonium fluoride; tert.-butyl lithium; sodium hydride; sodium hydrogencarbonate; Dess-Martin periodane; pyridinium hydrobromide perbromide; pyridinium chlorochromate; magnesium bromide;
In
tetrahydrofuran; diethyl ether; dichloromethane; N,N-dimethyl-formamide; isopropyl alcohol;
DOI:10.1021/ol026159t