CAS: 19172-47-5丨 Lawesson's Reagent

Nws yog ib qho tshuaj reagent feem ntau siv los tsim cov organic sulfur compounds. Nws yog cov hmoov daj daj ntawm qhov kub thiab txias. Nws muaj ib tug muaj zog thiab tsis kaj siab tsw ntawm lwj. Nws yog thawj zaug npaj los ntawm cov tshuaj tiv thaiv ntawm aromatics nrog tetraphosphorous decasulfide nyob rau hauv 1956. Swedish chemist Sven-OlovLawesson ua tib zoo kawm nws cov tshuaj tiv thaiv nrog cov organic tebchaw thiab nrov nws siv, li no lub npe. Lub molecule ntawm Lawson's reagent muaj plaub-ntiv nplhaib qauv ntawm alternating sulfur thiab phosphorus. Thaum rhuab, depolymerization tshwm sim los ua ob qhov tsis ruaj khov thiophosphorous yelide (R-PS2), uas yog cov tshuaj tiv thaiv tseem ceeb. Lub xub ntiag ntawm nruab nrab R-PS2 tau lees paub los ntawm 31NMR spectra ntawm cov khoom ntawm Lawson's reagent nrog ob qhov sib txawv. Lawson's reagent yog oxygen-sulfur exchange reagent, feem ntau daim ntawv thov yog kev npaj ntawm thioamide, hloov carbonyl tebchaw rau thiocarbonyl tebchaw, uas yuav reacted nrog substrates xws li ketone, ester, lactone, amide, lactam, quinone, thiab lwm yam. electron-nplua nuj carbonyl pawg reacts yooj yim dua. Qhov ob daim ntawv cog lus tsis raug cuam tshuam thaum reacting nrog , - unsaturated aldehydes thiab ketones.

CAS: 19172-47-5

Cim npe nrov: cas:19172-47-5丨lawesson's reagent, nqe, hais, luv nqi, hauv Tshuag, muag