Technology Process of (3aR,5R,6S,7S,7aR)-5-Hydroxymethyl-2-((2R,3R,4S,5R,6R)-3,4,5-tris-benzyloxy-6-benzyloxymethyl-tetrahydro-pyran-2-ylamino)-5,6,7,7a-tetrahydro-3aH-pyrano[2,3-d]oxazole-6,7-diol
There total 7 articles about (3aR,5R,6S,7S,7aR)-5-Hydroxymethyl-2-((2R,3R,4S,5R,6R)-3,4,5-tris-benzyloxy-6-benzyloxymethyl-tetrahydro-pyran-2-ylamino)-5,6,7,7a-tetrahydro-3aH-pyrano[2,3-d]oxazole-6,7-diol which
guide to synthetic route it.
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synthetic route:
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181960-87-2
(3aR,5R,6S,7S,7aR)-5-Hydroxymethyl-2-((2R,3R,4S,5R,6R)-3,4,5-tris-benzyloxy-6-benzyloxymethyl-tetrahydro-pyran-2-ylamino)-5,6,7,7a-tetrahydro-3aH-pyrano[2,3-d]oxazole-6,7-diol
- Guidance literature:
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Multi-step reaction with 5 steps
1: 84 percent / NaN3 / acetonitrile / 12 h / Heating
2: 69 percent / hydrogen / Pd(OH)2-on-charcoal / tetrahydrofuran; ethanol; H2O / 3 h / 24 °C
3: 217 mg / tetrahydrofuran / 48 h / 25 °C
4: 84 percent / KOH / aq. ethanol / 0.5 h / 25 °C
5: 1.) 2-chloro-3-ethylbenzoxazolium tetrafluoroborate, 2.) triethylamine / 1.) acetonitrile, 0-5 deg C, 2 h, 2.) acetonitrile, 0-5 deg C, 30 min
With
potassium hydroxide; sodium azide; 3-ethyl-2-chlorobenzoxazolium tetrafluoroborate; hydrogen; triethylamine;
palladium hydroxide - carbon;
In
tetrahydrofuran; ethanol; water; acetonitrile;
DOI:10.1016/0008-6215(96)00090-0
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181960-87-2
(3aR,5R,6S,7S,7aR)-5-Hydroxymethyl-2-((2R,3R,4S,5R,6R)-3,4,5-tris-benzyloxy-6-benzyloxymethyl-tetrahydro-pyran-2-ylamino)-5,6,7,7a-tetrahydro-3aH-pyrano[2,3-d]oxazole-6,7-diol
- Guidance literature:
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Multi-step reaction with 5 steps
1: 91 percent / Me3SiN3, SnCl4 / CH2Cl2 / 0.5 h / 24 °C
2: 69 percent / hydrogen / Pd(OH)2-on-charcoal / tetrahydrofuran; ethanol; H2O / 3 h / 24 °C
3: 217 mg / tetrahydrofuran / 48 h / 25 °C
4: 84 percent / KOH / aq. ethanol / 0.5 h / 25 °C
5: 1.) 2-chloro-3-ethylbenzoxazolium tetrafluoroborate, 2.) triethylamine / 1.) acetonitrile, 0-5 deg C, 2 h, 2.) acetonitrile, 0-5 deg C, 30 min
With
potassium hydroxide; trimethylsilylazide; 3-ethyl-2-chlorobenzoxazolium tetrafluoroborate; hydrogen; tin(IV) chloride; triethylamine;
palladium hydroxide - carbon;
In
tetrahydrofuran; ethanol; dichloromethane; water;
DOI:10.1016/0008-6215(96)00090-0
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181960-87-2
(3aR,5R,6S,7S,7aR)-5-Hydroxymethyl-2-((2R,3R,4S,5R,6R)-3,4,5-tris-benzyloxy-6-benzyloxymethyl-tetrahydro-pyran-2-ylamino)-5,6,7,7a-tetrahydro-3aH-pyrano[2,3-d]oxazole-6,7-diol
- Guidance literature:
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Multi-step reaction with 4 steps
1: 1.) hydrogen, 2.) silica gel / 1.) Pd(OH)2-on-charcoal / 1.) THF, water, 24 deg C, 2 h
2: 217 mg / tetrahydrofuran / 48 h / 25 °C
3: 84 percent / KOH / aq. ethanol / 0.5 h / 25 °C
4: 1.) 2-chloro-3-ethylbenzoxazolium tetrafluoroborate, 2.) triethylamine / 1.) acetonitrile, 0-5 deg C, 2 h, 2.) acetonitrile, 0-5 deg C, 30 min
With
potassium hydroxide; 3-ethyl-2-chlorobenzoxazolium tetrafluoroborate; hydrogen; silica gel; triethylamine;
palladium hydroxide - carbon;
In
tetrahydrofuran; ethanol;
DOI:10.1016/0008-6215(96)00090-0