4H-Thiopyran-4-thione

Base Information

• Chemical Name: 4H-Thiopyran-4-thione
• CAS No.: 1120-94-1
• Molecular Formula: C5H4 S2
• Molecular Weight: 128.219
• Hs Code.: 2934999090
• Mol file: 1120-94-1.mol

Synonyms:4H-Thiapyran-4-thione;Thia-g-thiopyrone; g-Thiothiapyrone

Chemical Property of 4H-Thiopyran-4-thione

Chemical Property:

• Vapor Pressure: 1.27mmHg at 25°C
• Boiling Point: 179.5°Cat760mmHg
• Flash Point: 62.4°C
• PSA: 60.33000
• Density: 1.3g/cm³
• LogP: 2.47760

Purity/Quality:

98%,99%, ^*data from raw suppliers

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

Technology Process of 4H-Thiopyran-4-thione

There total 2 articles about 4H-Thiopyran-4-thione 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: 95.0%

4-pyrone (108-97-4) → pyran-4-thione (1120-93-0) + thiopyran-4-thione (1120-94-1)

Guidance literature:

With Lawessons reagent; In toluene; at 80 ℃; for 1h;

DOI:10.1016/S0040-4020(00)00418-X

Reference yield:

6a-thia-1,6-thiophthene (252-09-5) → thiophene-3-thiol (7774-73-4) + thiopyran-4-thione (1120-94-1) + thioketene (18282-77-4) + 3-Methylene-3H-[1,2]dithiole + thiophene-3-thiol

Guidance literature:

at 1000 ℃; under 7.5006E-06 Torr; Product distribution; flash vacuum pyrolysis;

Reference yield:

thiopyran-4-thione (1120-94-1) → 4H-Thiopyran-4-one 1,1-dioxide (17396-38-2)

Guidance literature:

Multi-step reaction with 2 steps

1: mercury (II)-chloride; diethyl ether / Erhitzen des Reaktionsprodukts mit wss. Natriumcarbonat-Loesung

2: aqueous hydrogen peroxide; acetic acid

With diethyl ether; dihydrogen peroxide; acetic acid; mercury dichloride;

upstream raw materials:

6a-thia-1,6-thiophthene

4-pyrone

Downstream raw materials:

4H-thiopyran-4-one

Dithio-furoften

C₂₃H₁₉S₂Si

4H-Thiopyran-4-one 1,1-dioxide

Refernces

• 1、 Flammang, Robert,Barbieux-Flammang, Monique,Gerbaux, Pascal,Pedersen, Carl Th.. "Formation of thiophenethiols by flash vacuum pyrolysis of 1,6,6aλ4-trithiapentalenes". . p. 1261 - 1264. Retrieved 2007/10/03.