methyl 2-O-phenyglycylurs-3,23-isopropylidenedioxyurs-12-ene-28-oate

Base Information

• Chemical Name: methyl 2-O-phenyglycylurs-3,23-isopropylidenedioxyurs-12-ene-28-oate
• CAS No.: 1575689-23-4
• Molecular Formula: C₄₂H₆₁NO₆
• Molecular Weight: 675.949
• Mol file: 1575689-23-4.mol

Synonyms:methyl 2-O-phenyglycylurs-3,23-isopropylidenedioxyurs-12-ene-28-oate

Chemical Property of methyl 2-O-phenyglycylurs-3,23-isopropylidenedioxyurs-12-ene-28-oate

Chemical Property:

Purity/Quality:

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

Useful:

Technology Process of methyl 2-O-phenyglycylurs-3,23-isopropylidenedioxyurs-12-ene-28-oate

There total 5 articles about methyl 2-O-phenyglycylurs-3,23-isopropylidenedioxyurs-12-ene-28-oate 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: 62.0%

methyl 2α-O-(N-fluorenonemethyoxycarbonyl)-phenyglycylurs-3β,23-isopropylidenedioxyurs-12-ene-28-oate (1575689-22-3) → methyl 2-O-phenyglycylurs-3,23-isopropylidenedioxyurs-12-ene-28-oate (1575689-23-4)

Guidance literature:

With diethylamine; In dichloromethane; at 20 ℃; for 2h;

DOI:10.1248/cpb.c13-00328

Reference yield:

asiatic acid (464-92-6,89786-83-4,103974-74-9,106327-64-4,114580-55-1,116348-15-3,143839-02-5) → methyl 2-O-phenyglycylurs-3,23-isopropylidenedioxyurs-12-ene-28-oate (1575689-23-4)

Guidance literature:

Multi-step reaction with 4 steps

1: toluene-4-sulfonic acid / N,N-dimethyl-formamide / 5 h / 20 °C

2: potassium carbonate / N,N-dimethyl-formamide / 6 h / 20 °C

3: dmap; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride / dichloromethane / 3 h / 0 - 20 °C

4: diethylamine / dichloromethane / 2 h / 20 °C

With dmap; potassium carbonate; toluene-4-sulfonic acid; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; diethylamine; In dichloromethane; N,N-dimethyl-formamide;

DOI:10.1248/cpb.c13-00328

Reference yield:

2α-hydroxy-3β,23-isopropylidenedioxy-urs-12-ene-28-oic acid (139610-49-4) → methyl 2-O-phenyglycylurs-3,23-isopropylidenedioxyurs-12-ene-28-oate (1575689-23-4)

Guidance literature:

Multi-step reaction with 3 steps

1: potassium carbonate / N,N-dimethyl-formamide / 6 h / 20 °C

2: dmap; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride / dichloromethane / 3 h / 0 - 20 °C

3: diethylamine / dichloromethane / 2 h / 20 °C

With dmap; potassium carbonate; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; diethylamine; In dichloromethane; N,N-dimethyl-formamide;

DOI:10.1248/cpb.c13-00328

upstream raw materials:

asiatic acid

2α-hydroxy-3β,23-isopropylidenedioxy-urs-12-ene-28-oic acid

methyl 2α-O-(N-fluorenonemethyoxycarbonyl)-phenyglycylurs-3β,23-isopropylidenedioxyurs-12-ene-28-oate

methyl 2α-hydroxy-3β,23-isopropylidenedioxyurs-12-ene-28-oate