21548-49-2

Basic information

• Product Name: Dithiocarbonic Acid Cyclic S,S-Propylene Ester
• Synonyms: 4-Methyl-1,3-dithiolan-2-one;Dithiocarbonic Acid Cyclic S,S-Propylene Ester;1,3-Dithiolan-2-one, 4-Methyl-
• CAS NO: 21548-49-2
• Molecular Formula: C4H6OS2
• Molecular Weight: 134.21984
• Mol File: 21548-49-2.mol
• Article Data: 1

Chemical Properties

• Boiling Point: 191.8°Cat760mmHg
• Flash Point: 76.1°C
• Appearance: /
• Density: 1.288g/cm³
• Vapor Pressure: 0.506mmHg at 25°C
• Refractive Index: 1.586
• Storage Temp.: 2-8°C
• CAS DataBase Reference: Dithiocarbonic Acid Cyclic S,S-Propylene Ester(CAS DataBase Reference)
• NIST Chemistry Reference: Dithiocarbonic Acid Cyclic S,S-Propylene Ester(21548-49-2)
• EPA Substance Registry System: Dithiocarbonic Acid Cyclic S,S-Propylene Ester(21548-49-2)

Safety Data

• Hazardous Substances Data: 21548-49-2(Hazardous Substances Data)

Usage

Uses

4-Methyl-1,3-dithiolan-2-one (cas# 21548-49-2) is a compound useful in organic synthesis.

InChI:InChI=1/C4H6OS2/c1-3-2-6-4(5)7-3/h3H,2H2,1H3

Upstream product

• 3489-45-0 4-methyl-1,3-dithiolane-2-thione 
• 286-20-4 cyclohexane-1,2-epoxide 

Relevant articles and documents

Convenient procedure for converting 1,3-dithiolane-2-thiones into 1,3-dithiolan-2-ones

1,3-Dithiolan-2-ones have been obtained by reaction of 1,3-dithiolane-2-thiones and epoxides in the presence of HBF4·Et2O. The reactions, carried out in anhydrous CH2Cl2 at 0-5°C→room temperature (Procedure A) or in anhydrous chlorobenzene at 0-5→80°C (Procedure B), gave product yields of 63-95%. By Procedure B it was also possible to isolate the intermediates 1-oxa-4,6,9-trithiaspiro[4,4]nonanes in good yields (66-85%). Reaction pathways are proposed.