(5R,6R)-6-[(1R,2S)-3-benzyloxy-2-methoxy-1-methyl-propyl]-5-methyl-4-oxo-5,6-dihydro-2H-pyran-2-carboxylic acid methyl ester

Base Information

Chemical Name:(5R,6R)-6-[(1R,2S)-3-benzyloxy-2-methoxy-1-methyl-propyl]-5-methyl-4-oxo-5,6-dihydro-2H-pyran-2-carboxylic acid methyl ester
CAS No.:804551-92-6
Molecular Formula:C₂₀H₂₆O₆
Molecular Weight:362.423
Hs Code.:

Synonyms:(5R,6R)-6-[(1R,2S)-3-benzyloxy-2-methoxy-1-methyl-propyl]-5-methyl-4-oxo-5,6-dihydro-2H-pyran-2-carboxylic acid methyl ester

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Chemical Property of (5R,6R)-6-[(1R,2S)-3-benzyloxy-2-methoxy-1-methyl-propyl]-5-methyl-4-oxo-5,6-dihydro-2H-pyran-2-carboxylic acid methyl ester

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Technology Process of (5R,6R)-6-[(1R,2S)-3-benzyloxy-2-methoxy-1-methyl-propyl]-5-methyl-4-oxo-5,6-dihydro-2H-pyran-2-carboxylic acid methyl ester

There total 7 articles about (5R,6R)-6-[(1R,2S)-3-benzyloxy-2-methoxy-1-methyl-propyl]-5-methyl-4-oxo-5,6-dihydro-2H-pyran-2-carboxylic acid methyl ester 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: 65.0%

: 804552-02-1
(2R,4S,5S)-4-((1S,2S)-3-Benzyloxy-2-methoxy-1-methyl-propyl)-5-methyl-3,7-dioxa-bicyclo[4.1.0]heptane-2-carboxylic acid methyl ester

: 804551-92-6
(5R,6R)-6-[(1R,2S)-3-benzyloxy-2-methoxy-1-methyl-propyl]-5-methyl-4-oxo-5,6-dihydro-2H-pyran-2-carboxylic acid methyl ester

Guidance literature:: (2R,4S,5S)-4-((1S,2S)-3-Benzyloxy-2-methoxy-1-methyl-propyl)-5-methyl-3,7-dioxa-bicyclo[4.1.0]heptane-2-carboxylic acid methyl ester; With potassium carbonate; In methanol; at 20 ℃; for 2h;

With dipyridinium dichromate; 4 A molecular sieve; In dichloromethane; at 20 ℃; for 2h;
DOI:10.1021/ol0480325

Reference yield:

: 60656-87-3
benzyloxyacetoaldehyde

: 804551-92-6
(5R,6R)-6-[(1R,2S)-3-benzyloxy-2-methoxy-1-methyl-propyl]-5-methyl-4-oxo-5,6-dihydro-2H-pyran-2-carboxylic acid methyl ester

Guidance literature:: Multi-step reaction with 7 steps

1.1: 87 percent / SnCl₄ / CH₂Cl₂ / 12 h / -78 °C

2.1: 2.8 g / SbCl₅ / CH₂Cl₂ / -78 - -50 °C

3.1: 95 percent / Proton Sponge(R); molecular sieves 4 Angstroem / CH₂Cl₂ / 6 h

4.1: O₃ / methanol; CH₂Cl₂ / -78 °C

4.2: Me₂S / methanol; CH₂Cl₂ / 12 h / -78 - 20 °C

5.1: 85 percent / TfOH / CH₂Cl₂ / 24 h / -70 °C

6.1: 80 percent / m-CPBA / CH₂Cl₂ / 12 h / 20 °C

7.1: K₂CO₃ / methanol / 2 h / 20 °C

7.2: 65 percent / molecular sieves 4 Angstroem; PDC / CH₂Cl₂ / 2 h / 20 °C

With trifluorormethanesulfonic acid; 4 A molecular sieve; antimonypentachloride; tin(IV) chloride; N,N,N',N'-tetramethyl-1,8-diaminonaphthalene; potassium carbonate; ozone; 3-chloro-benzenecarboperoxoic acid; In methanol; dichloromethane;
DOI:10.1021/ol0480325

Reference yield:

: 804551-90-4
(2R,3S)-4-benzyloxy-3-methoxy-2-methyl-butyraldehyde

: 804551-92-6
(5R,6R)-6-[(1R,2S)-3-benzyloxy-2-methoxy-1-methyl-propyl]-5-methyl-4-oxo-5,6-dihydro-2H-pyran-2-carboxylic acid methyl ester

Guidance literature:: Multi-step reaction with 3 steps

1.1: 85 percent / TfOH / CH₂Cl₂ / 24 h / -70 °C

2.1: 80 percent / m-CPBA / CH₂Cl₂ / 12 h / 20 °C

3.1: K₂CO₃ / methanol / 2 h / 20 °C

3.2: 65 percent / molecular sieves 4 Angstroem; PDC / CH₂Cl₂ / 2 h / 20 °C

With trifluorormethanesulfonic acid; potassium carbonate; 3-chloro-benzenecarboperoxoic acid; In methanol; dichloromethane;
DOI:10.1021/ol0480325