Toluene-4-sulfonic acid (3aR,5R,6S,7R,8S)-6,7,8-tris-benzyloxy-3a,4,5,6,7,8-hexahydro-3H-cyclohepta[c]isoxazol-5-yl ester

Base Information

• Chemical Name: Toluene-4-sulfonic acid (3aR,5R,6S,7R,8S)-6,7,8-tris-benzyloxy-3a,4,5,6,7,8-hexahydro-3H-cyclohepta[c]isoxazol-5-yl ester
• CAS No.: 146176-86-5
• Molecular Formula: C₃₆H₃₇NO₇S
• Molecular Weight: 627.758
• Mol file: 146176-86-5.mol

Synonyms:Toluene-4-sulfonic acid (3aR,5R,6S,7R,8S)-6,7,8-tris-benzyloxy-3a,4,5,6,7,8-hexahydro-3H-cyclohepta[c]isoxazol-5-yl ester

Chemical Property of Toluene-4-sulfonic acid (3aR,5R,6S,7R,8S)-6,7,8-tris-benzyloxy-3a,4,5,6,7,8-hexahydro-3H-cyclohepta[c]isoxazol-5-yl ester

Chemical Property:

Purity/Quality:

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

Useful:

Technology Process of Toluene-4-sulfonic acid (3aR,5R,6S,7R,8S)-6,7,8-tris-benzyloxy-3a,4,5,6,7,8-hexahydro-3H-cyclohepta[c]isoxazol-5-yl ester

There total 1 articles about Toluene-4-sulfonic acid (3aR,5R,6S,7R,8S)-6,7,8-tris-benzyloxy-3a,4,5,6,7,8-hexahydro-3H-cyclohepta[c]isoxazol-5-yl 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: 75.0%

(3aR,5R,6R,7R,8S)-6,7,8-Tris-benzyloxy-3a,4,5,6,7,8-hexahydro-3H-cyclohepta[c]isoxazol-5-ol (141077-21-6,141195-15-5) + p-toluenesulfonyl chloride (98-59-9) → Toluene-4-sulfonic acid (3aR,5R,6S,7R,8S)-6,7,8-tris-benzyloxy-3a,4,5,6,7,8-hexahydro-3H-cyclohepta[c]isoxazol-5-yl ester (146176-86-5)

Guidance literature:

With pyridine; at 20 ℃;

DOI:10.1016/S0040-4039(00)74717-4

Reference yield: 75.0%

Toluene-4-sulfonic acid (3aR,5R,6S,7R,8S)-6,7,8-tris-benzyloxy-3a,4,5,6,7,8-hexahydro-3H-cyclohepta[c]isoxazol-5-yl ester (146176-86-5) → Toluene-4-sulfonic acid (1R,2S,3S,4R,6S)-2,3,4-tris-benzyloxy-6-hydroxymethyl-5-oxo-cycloheptyl ester (146176-82-1)

Guidance literature:

With hydrogen; boric acid; nickel; In methanol; water;

DOI:10.1016/S0040-4039(00)74717-4

Reference yield:

Toluene-4-sulfonic acid (3aR,5R,6S,7R,8S)-6,7,8-tris-benzyloxy-3a,4,5,6,7,8-hexahydro-3H-cyclohepta[c]isoxazol-5-yl ester (146176-86-5) → Toluene-4-sulfonic acid (1R,2S,3R,4S,5S)-2,3,4-tris-benzyloxy-5-hydroxy-cycloheptyl ester (146176-84-3)

Guidance literature:

Multi-step reaction with 4 steps

1: 75 percent / hydrogen, B(OH)3 / Ra/Ni / methanol; H₂O

2: 88 percent / DMSO/(COCl)2, Et₃N / -60 °C

3: 75 percent / Zn, TMEDA, AcOH / ethanol / 2 h

4: diisobutylaluminium hydride / diethyl ether / -50 °C

With oxalyl dichloride; N,N,N,N,-tetramethylethylenediamine; hydrogen; boric acid; diisobutylaluminium hydride; acetic acid; dimethyl sulfoxide; triethylamine; zinc; nickel; In methanol; diethyl ether; ethanol; water;

DOI:10.1016/S0040-4039(00)74717-4

upstream raw materials:

(3aR,5R,6R,7R,8S)-6,7,8-Tris-benzyloxy-3a,4,5,6,7,8-hexahydro-3H-cyclohepta[c]isoxazol-5-ol

p-toluenesulfonyl chloride

Downstream raw materials:

Toluene-4-sulfonic acid (1R,2S,3S,4R,6S)-2,3,4-tris-benzyloxy-6-hydroxymethyl-5-oxo-cycloheptyl ester

Toluene-4-sulfonic acid (1R,2S,3R,4S,5S)-2,3,4-tris-benzyloxy-5-hydroxy-cycloheptyl ester

Toluene-4-sulfonic acid (1R,2S,3S,4R)-2,3,4-tris-benzyloxy-5-oxo-cycloheptyl ester