Parası kalmadığı için otobüse binemiyordur ailesi porno izle ona daha yeni para gönderdiği için tekrar porno istemeye utanınca mecburen otostop çekmek için youporn çantasını alarak yol kenarına gelir etekli porno liseli türk kız yol kenarında dururken yanına yaklaşan porno kibar bir gencin onu gideceği yere kadar bırakmak porno izle istemesine çok mutlu olur arabaya bindiklerinde gideceği yer ile porno arabayı kullanan adamın gittiği yer arasında çok mesafe sex izle farkı olduğunu anlayan türk kız bu yaptığı porno indir iyilik karşısında arabada ona memelerini açar porno sapıklaşan adam yol kenarındaki hotelde durarak porno izle üniversiteli otostop çeken türk kızına odada sakso çektirip sikerMetal-Free Photochemical Borylation of Aryl Halides| Abstract
All submissions of the EM system will be redirected to Online Manuscript Submission System. Authors are requested to submit articles directly to Online Manuscript Submission System of respective journal.

Abstract

Metal-Free Photochemical Borylation of Aryl Halides

Author(s): Charlo William

Arylboronic acids and esters have a wide range of uses in the chemical, pharmaceutical, and materials sciences. They are flexible synthons for the creation of carbon–carbon or carbon–heteroatom bonds in synthetic organic chemistry. Reactions of arylmetallic intermediates with trialkyl borates, followed by transesterication or hydrolysis, are the traditional procedures for producing arylboron compounds. These reactions have several significant limitations, including restricted functional group tolerance and the requirement of strict anhydrous conditions. Transition metal-catalyzed borylation processes including palladium, nickel, copper, and zinc have developed as very helpful ways for converting C–X bonds to C-B bonds in recent decades [1]. Direct C–H borylation techniques based on transition-metal catalysts have been developed more recently. Several transition-metal-free approaches for C–B bond synthesis have been developed to reduce costs and the amount of heavy metal residue in final products. Ito and colleagues showed that an alkali alkoxide-mediated borylation of aryl halides can be achieved using a silylborane as the only borylating reagent [1,4]. Zhang and colleagues found that aryl iodides could be borylated in reuxing methanol with 4.0 equivalents of bis(pinacolato) diboron and 2.0 equivalents of Ce2CO3 as the promoter. The reaction time ranged from a few hours to several days, with moderate yields [2,3].  Under mild circumstances, Fernandes and Muniz converted diaryliodonium acetates to arylboronates.

 


Share this       
Google Scholar citation report
Citations : 471

Organic Chemistry: An Indian Journal received 471 citations as per Google Scholar report

Indexed In

  • CASS
  • Google Scholar
  • Open J Gate
  • China National Knowledge Infrastructure (CNKI)
  • Cosmos IF
  • Directory of Research Journal Indexing (DRJI)
  • Secret Search Engine Labs

Read More

Flyer