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Henan Alpha Chemical Co., Ltd.
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| Products Intro: |
Cas:19172-47-5
ProductName:Lawesson reagent
Purity: 98% | Package: g；kg
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- Burgess reagent
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- $5.00 / 1KG
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2024-01-14
- CAS:29684-56-8
- Min. Order: 1KG
- Purity: 99%
- Supply Ability: g-kg-tons, free sample is available
- Lawesson"s Reagent
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- $15.00 / 1KG
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2021-07-02
- CAS:19172-47-5
- Min. Order: 1KG
- Purity: 99%+ HPLC
- Supply Ability: Monthly supply of 1 ton
- EATON'S REAGENT
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- $1.00 / 1KG
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2019-07-12
- CAS:39394-84-8
- Min. Order: 1KG
- Purity: 99%
- Supply Ability: 25kg
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| Product Name: | Lawesson Reagent | | Synonyms: | AURORA KA-1707;4-METHOXYPHENYLTHIOPHOSPHORIC CYCLIC DI(THIOANHYDRIDE);2,4-DI(4-METHOXYPHENYL)-1,3,2LAMBDA-5,4LAMBDA-5-DITHIADIPHOSPHETANE-2,4-DITHIONE;P-METHOXYPHENYLTHIONOPHOSPHINE SULFIDE DIMER;P-METHOXYPHENYLTHIOPHOSPHINE SULFIDE, DIMER;2,4-bis(4-methoxyphenyl)-1,3-dithia-2,4-diphosphetane 2,4-disulphide;2,4-Bis(methoxyphenyl)-1,3-dithia-2,4-diphosphetane-2,4-disulfide;Lawesson's Reagent [Sulfurating Reagent] | | CAS: | 19172-47-5 | | MF: | C14H14O2P2S4 | | MW: | 404.47 | | EINECS: | 242-855-4 | | Product Categories: | Dithietanes;Simple 4-Membered Ring Compounds;Sulfur Compounds (for Synthesis);Synthetic Organic Chemistry;Ring Systems;intermediate | | Mol File: | 19172-47-5.mol |  |
| | Lawesson Reagent Chemical Properties |
| Melting point | 228-230 °C(lit.) | | Boiling point | 525.8±60.0 °C(Predicted) | | density | 1.48±0.1 g/cm3(Predicted) | | storage temp. | Inert atmosphere,2-8°C | | solubility | Chloroform (Slightly) | | form | Powder | | color | White to almost white | | Water Solubility | Decomposition | | Sensitive | Moisture Sensitive | | Merck | 14,5391 | | BRN | 1024888 | | InChI | InChI=1S/C14H14O2P2S4/c1-15-11-3-7-13(8-4-11)17(19)21-18(20,22-17)14-9-5-12(16-2)6-10-14/h3-10H,1-2H3 | | InChIKey | CFHGBZLNZZVTAY-UHFFFAOYSA-N | | SMILES | S1P(=S)(C2=CC=C(OC)C=C2)SP1(=S)C1=CC=C(OC)C=C1 | | CAS DataBase Reference | 19172-47-5(CAS DataBase Reference) | | EPA Substance Registry System | 1,3,2,4-Dithiadiphosphetane, 2,4-bis(4-methoxyphenyl)-, 2,4-disulfide (19172-47-5) |
| | Lawesson Reagent Usage And Synthesis |
| Description | Lawesson's reagent is a thiation agent used to convert carbonyl compounds into thiocarbonyls. It is also used to thionate enones, esters, lactones, amides, lactams and quinones. Further, it is used to prepare thiols from alcohols. It is associated with silver perchlorate and utilized as and oxophilic Lewis acid catalyst for Diels-Alder reaction of dienes with alfa, beta-unsaturated aldehydes. | | Uses | Lawesson Reagent was mainly used in the thionation of various types of carbonyl groups, but nowadays it is also used in the construction of valuable heterocycles, important coupling reactions, and the decoration of metal-based attractive cores. Lawesson Reagent can convert an oxygen atom to a sulphur atom in a ketone, aldehyde, ester, amide, lactones, lactams, and quinones. Ketones, amides, and lactams react faster than corresponding esters. | | Reaction mechanism | Lawesson’s reagent is in equilibrium with reactive intermediate 2 (dithiophosphine ylide). This ylide then reacts with the carbonyl group to form thiaoxaphosphetane intermediate 3, which is further decomposed by a cycloelimination mechanism as a Wittig-analogous reaction. |
| | Lawesson Reagent Preparation Products And Raw materials |
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