Trimethyl orthobutyrate
Trimethyl orthobutyrate
  • CAS No.:43083-12-1
Other grades of this product :
Trimethyl orthobutyrate Basic information
Product Name:Trimethyl orthobutyrate
Synonyms:Butane, 1,1,1-trimethoxy-;ORTHO-N-BUTYRIC ACID TRIMETHYL ESTER;ORTHOBUTYRIC ACID TRIMETHYL ESTER;TRIMETHYL ORTHOBUTYRATE;1,1,1-TRIMETHOXYBUTANE;Trimethyl orthobutylate;RimethylOrthobutyrate;o-Trimethyl butyrate
CAS:43083-12-1
MF:C7H16O3
MW:148.2
EINECS:256-079-9
Product Categories:Organic synthesis;Intermediates of Dyes and Pigments;Orthoesters
Mol File:43083-12-1.mol
Trimethyl orthobutyrate Chemical Properties
Boiling point 145-147 °C (lit.)
density 0.926 g/mL at 25 °C (lit.)
refractive index 1.402-1.404
Fp 50 °C
storage temp. Flammables area
solubility Chloroform, Ethyl Acetate
form Liquid
color Clear colorless to slightly yellow
Specific Gravity0.926
BRN 1737319
CAS DataBase Reference43083-12-1(CAS DataBase Reference)
NIST Chemistry ReferenceTrimethyl orthobutyrate(43083-12-1)
Safety Information
Hazard Codes Xi,F
Risk Statements 36/38-10-36/37/38
Safety Statements 37/39-26-16-36
RIDADR UN 3272
WGK Germany 3
HazardClass 3.2
PackingGroup III
HS Code 29159000
MSDS Information
ProviderLanguage
ACROS English
Trimethyl orthobutyrate Usage And Synthesis
Chemical PropertiesClear colorless to slightly yellow liquid
UsesTrimethyl orthobutyrate has been used in the preparation of:
  • 5-acetamido-9-O-butyroyl-3,5-dideoxy-D-glycero-2-nonulo pyranosonic acid
  • 9-O-butyroyl-3,5-dideoxy-5-glycoloylamido-D-glycero-2-nonulo pyranosonic acid
UsesTrimethyl orthobutyrate can be used for:
  • Acylation at OH-9 of N-acetylneuraminic acid and N-glycoloylneuraminic acid to give the corresponding 9-O-acylated derivatives.
  • Conversion of 2-amino-N-(1-H-benzimidazol-2-yl)benzamide to 2-propyl-3-benzimidazolyl-4(3H)-quinazolinone.
  • Preparation of 2-propyl substituted benzimidazoles from 1,2-benzenediamines.
It can also be used in the total synthesis of dl-camptothecin, Olmesartan Medoxomil, DE and CDE ring analogs of camptothecin, and homologs of 1,25-dihydroxyvitamin D3.
General DescriptionKinetics and mechanism of gas-phase elimination of trimethyl orthobutyrate has been examined over the temperature range of 310-369°C and pressure range of 50-130Torr.
Trimethyl orthobutyrate Preparation Products And Raw materials

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