Overview
1,3-Dithiane is a six-membered heterocyclic compound containing two sulfur atoms. It is a versatile building block in organic chemistry, particularly valued for its ability to mask carbonyl groups via dithioacetal formation. The compound was first synthesized in the mid-20th century and has since become a staple in synthetic routes for pharmaceuticals, agrochemicals, and specialty chemicals. Its cyclic structure provides stability, while the sulfur atoms enable unique reactivity patterns. Industrial-scale production typically involves the reaction of 1,3-dibromopropane with sodium sulfide, followed by purification. The compound is commercially available in kilogram quantities for laboratory and industrial use.
Physical and Chemical Properties
1,3-Dithiane appears as white crystalline solids with a faint sulfurous odor. It is thermally stable up to 200°C but may decompose at higher temperatures, releasing sulfur oxides. The compound is hydrophobic, with negligible solubility in water but good solubility in common organic solvents like dichloromethane and THF. Chemically, it acts as a nucleophile due to the lone pairs on sulfur atoms. It forms stable complexes with metals (e.g., palladium) and reacts with alkyl halides to generate sulfonium salts. Notably, its protons at the 2-position are acidic (pKa ~31), allowing deprotonation with strong bases to form reactive carbanions for C-C bond formation.
Main Applications
The primary use of 1,3-dithiane is as a protecting group for aldehydes and ketones in multistep syntheses. By converting carbonyls to dithianes, chemists can shield these functional groups from unwanted reactions during subsequent steps. The protecting group is later removed using mercury(II) salts or oxidative methods. In medicinal chemistry, it serves as a precursor to thioacetals and thioketals. It also participates in Corey-Seebach reactions to elongate carbon chains. Industrial applications include flavor/fragrance synthesis and rubber vulcanization accelerators. Recent research explores its role in battery electrolytes due to sulfur's redox activity.
Safety and Storage
1,3-Dithiane poses moderate health risks. Acute exposure may cause eye/skin irritation, and inhalation of dust should be avoided. Proper PPE (gloves, goggles) is mandatory when handling. Although not classified as flammable, thermal decomposition can release toxic gases (e.g., SOx). Storage requires airtight containers in cool (<25°C), ventilated areas separate from oxidizers. Shelf life typically exceeds two years when stored properly. Spills should be contained with inert absorbents and disposed of as hazardous waste. Regulatory status varies by region; in the EU, it falls under REACH but lacks specific hazard labeling.
B2B Procurement Guide
When sourcing 1,3-dithiane, prioritize suppliers with ISO 9001 certification to ensure consistent quality. Key specifications to verify include purity (≥98% for most applications), residual solvent levels, and crystal morphology. Bulk purchases (25kg drums) typically offer 10-15% cost savings over small-scale packaging. Logistics considerations include temperature control during summer months to prevent melting. Some manufacturers offer custom derivatization services (e.g., 2-lithio-1,3-dithiane) for advanced users. Lead times average 2-4 weeks for spot orders, with annual contracts providing better pricing stability. Always request SDS and CoA documentation.
Related Manufacturers
- 主营：阻燃剂、乙酸镍、乙酸镝、二噻烷、硫酸锂、硫酸锶、溴氨酸、香茅醇、肌氨酸、锂电池、四氢萘、磷酸铬、碳酸镁、碳酸镍、防冻剂、磷酸铝、叔丁醇、氟苯基、浮选剂、稀释剂、羟乙基、去除剂、庚二酸、除磷剂、十八烯、蛋白酶
- 主营：乙二醇、二甲基亚砜、丙二醇、二噻烷、精对苯二甲酸、己二酸、聚乙烯醇、聚乙二醇、木质素、甘油、三甘醇、己内酰胺、叔十二硫醇、白油、对苯二甲酸二甲酯、4-丁二醇
- 主营：甜菊糖、氯乙酰、二乙苯、4316-73-8、7783-40-6、1310-58-3、酞菁绿、阻燃剂、二戊烯、单甲醚、硫酸锂、4861-19-2、大理石、1192-62-7、羊脂酸、磷酸氢、8002-74-2、7782-61-8、龙脑油、2842-44-6、聚甘油、二聚酸、戊二醇、聚醚f68、磺化油
- 主营：肌氨酸钠、硫化锰、V50偶氮二异丁脒盐酸盐、二氧杂噻烷、腰果酚缩水甘油醚、乙硫氮、二新癸酸二甲基锡、三硫代碳酸钠、PX-4MP、芥酸PKO、四氧化三锰
- 主营：13、白僵菌素、薯蓣皂苷
- 主营：叔碳酸、十八醛、溶菌酶、二噻烷、海藻糖、癸二醇、氨基丙基、氢路噻嗪、邻苯二甲、乙基碳二、羟基癸酸、正十七烷、谷胱甘肽、烷二甲醇、松果体素、vc磷酸酯镁、2-甲基丁醛、朱栾倍半萜、丁烷四乙酸、表面活性剂、癸烷撑二醇、缩水甘油邻、10-羟基羊蜡酸、氢氯噻嗪杂质、盐酸邻菲罗啉、壳聚糖季铵盐
- 主营：棕榈酸、乙酸铋、异喹啉、4-二氟苄溴|、3-丙烷磺内酯、胶粘剂、丙烯酸酯、化学试剂、分析试剂、透明液体、二乙二醇、光引发剂、岩白菜素、对甲苯磺酸、苯甲酸苄酯、偏苯三酸酐、六氟异丙醇、纳米氧化铽、六氟磷酸铯、表面活性剂、蓖麻醇酸锌、乙基纤维素、荧光指示剂、2-乙二硫醇、丙烯酸羟乙酯
- 主营：氯化氢乙醇、二苯基硅二醇、甲基磺酸铋、23、阻燃剂DDP、萃取剂、HTPB、防老剂
- 主营：13、硅油树脂、中间体、香精香料
- 主营：防老剂、香精香料、乳化剂、23、壳聚糖
- 主营：固体酸催化剂、重组胶原蛋白、硅油、二噻烷、特种硅油、聚硅氮烷、硼酸铝晶须、碳化硅晶须、t-BAMBP萃取剂、全氟三丁胺
- 主营：肉桂醛、肉桂酸、汉防己甲素、应13、阻燃剂、褪黑素、甘氨酸、增塑剂
- 主营：硫化铵、氧化石蜡皂、选矿药剂、二噻烷、表面活性剂、乳化剂、捕收剂、萃取剂、阻燃剂
- 主营：网站建设、企业官网设计、网站搭建
- 主营：乙酰肼、甲氧基聚乙二醇丙烯酸酯、甲基丙烯酸叔丁氨基乙酯、23、2'-联吡啶、丙半胱氨酸