1262523-66-9

Base Information

• Chemical Name: 1262523-66-9
• CAS No.: 1262523-66-9
• Molecular Formula: C₃₁H₄₄N₂O₁₁S
• Molecular Weight: 652.763
• Mol file: 1262523-66-9.mol

Synonyms:(2S,4S)‐tert‐butyl 2‐(tert‐butoxycarbonylamino)‐5‐oxo‐4‐(tosyloxy)‐5‐(2,4,6‐trimethoxybenzylamino)pentanoate

Chemical Property of 1262523-66-9

Chemical Property:

• Boiling Point: 801.0±65.0 °C(Predicted)
• PKA: 10.74±0.46(Predicted)
• Density: 1.208±0.06 g/cm3(Predicted)

Purity/Quality:

97% ^*data from raw suppliers

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

Useful:

Technology Process of 1262523-66-9

There total 11 articles about 1262523-66-9 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: 99.0%

(2S,4S)-tert-butyl-2-(tert-butoxycarbonylamino)-4-hydroxy-5-oxo-5-(2,4,6-trimethoxybenzylamino)pentanoate (1262523-62-5) + p-toluenesulfonyl chloride (98-59-9) → (2S,4S)‐tert‐butyl 2‐(tert‐butoxycarbonylamino)‐5‐oxo‐4‐(tosyloxy)‐5‐(2,4,6‐trimethoxybenzylamino)pentanoate (1262523-66-9)

Guidance literature:

With dmap; triethylamine; In dichloromethane; at 0 - 20 ℃;

DOI:10.1021/ja109203d

Reference yield: 96.0%

→ (2S,4S)‐tert‐butyl 2‐(tert‐butoxycarbonylamino)‐5‐oxo‐4‐(tosyloxy)‐5‐(2,4,6‐trimethoxybenzylamino)pentanoate (1262523-66-9)

Guidance literature:

Reference yield:

2-(isocyanomethyl)-1,3,5-trimethoxybenzene (480438-26-4) → (2S,4S)‐tert‐butyl 2‐(tert‐butoxycarbonylamino)‐5‐oxo‐4‐(tosyloxy)‐5‐(2,4,6‐trimethoxybenzylamino)pentanoate (1262523-66-9)

Guidance literature:

Multi-step reaction with 3 steps

1: dichloromethane / 24 h / 20 °C

2: sodium hydrogencarbonate; thiourea / tetrahydrofuran; ethanol / 1.5 h / 50 °C

3: dmap; triethylamine / dichloromethane / 0 - 20 °C

With dmap; sodium hydrogencarbonate; triethylamine; thiourea; In tetrahydrofuran; ethanol; dichloromethane; 1: Passerini reaction;

DOI:10.1021/ja109203d

upstream raw materials:

2-(isocyanomethyl)-1,3,5-trimethoxybenzene

(2S)-tert-butyl-2-(tert-butoxycarbonylamino)-4-(2-chloroacetoxy)-5-oxo-5-(2,4,6-trimethoxybenzylamino)pentanoate

(2S,4S)-tert-butyl-2-(tert-butoxycarbonylamino)-4-hydroxy-5-oxo-5-(2,4,6-trimethoxybenzylamino)pentanoate

p-toluenesulfonyl chloride

Downstream raw materials:

(2S,4S)-tert-butyl-2-(tert-butoxycarbonylamino)-4-fluoro-5-oxo-5-(2,4,6-trimethoxybenzylamino)pentanoate

(2S,4R)-tert-butyl-2-(tert-butoxycarbonylamino)-4-fluoro-5-oxo-5-(2,4,6-trimethoxybenzylamino)pentanoate

(2R,4R)-tert-butyl-2-(tert-butoxycarbonylamino)-4-fluoro-5-oxo-5-(2,4,6-trimethoxybenzylamino)pentanoate

C₂₄H₃₇⁽¹⁸⁾FN₂O₈