41786-37-2Relevant academic research and scientific papers
An efficient oxidative conversion of 2-aryl-2H-chromenes to the corresponding flavones by tert-butylhydroperoxide and copper bromide
Banerjee, Dipanwita,Kayal, Utpal,Maiti, Gourhari
supporting information, p. 1667 - 1671 (2016/04/04)
A simple and efficient method has been developed for the facile oxidation of chromenes to the corresponding flavones by tert-butylhydroperoxide (TBHP) in the presence of copper(II) bromide catalyst in toluene at 80 °C in a very short time. The reaction demonstrates excellent reactivity, functional group tolerance, and good to excellent yields without using conventional strong oxidizing agents.
Structurally diverse α-substituted benzopyran synthesis through a practical metal-free C(sp3)-H functionalization
Chen, Wenfang,Xie, Zhiyu,Zheng, Hongbo,Lou, Hongxiang,Liu, Lei
supporting information, p. 5988 - 5991 (2015/01/08)
A trityl ion-mediated practical C-H functionalization of a variety of benzopyrans with a wide range of nucleophiles (organoboranes and C-H molecules) at ambient temperature has been disclosed. The metal-free reaction has an excellent functional group tole
An unexpected rearrangement-hydration reaction sequence of 2H-chromenes to dihydrochalcones under catalysis of HAuCl4
Maiti, Gourhari,Kayal, Utpal,Karmakar, Rajiv,Bhattacharya, Rudraksha N.
, p. 6321 - 6325,5 (2012/12/12)
2-Aryl-2H-chromenes in aqueous DCM medium under catalysis of HAuCl 4 are converted into 3-(2-hydroxyaryl)-1-arylpropan-1-ones through hydration-rearrangement reaction sequence in very good yield. The key step probably involves the [1,5] hydride shift followed by the hydrolysis under the reaction condition. The notable advantages of this method are operational simplicity and ease of isolation of products and also provide a pathway to convert the chalcone into DHCs with the transposition of carbonyl group. 2012 Elsevier Ltd. All rights reserved.
A FACILE SYNTHESIS OF ARYL ETHERS OF ETHYNYLCARBINOLS USING THE MITSUNOBU REACTION
Subramanian, R. Sankara,Balasubramanian, K. K.
, p. 1255 - 1260 (2007/10/02)
The facile synthesis of a few aryl ethers of ethynylcarbinols using the Mitsunobu reaction is reported.
A NOVEL SYNTHESIS OF FLAV-3-ENES BY CLAISEN REARRANGEMENT
Subramanian, Rajaram Sankara,Balasubramanian, Kalpattu Kuppusamy
, p. 6797 - 6800 (2007/10/02)
1-Arylprop-2-ynyl aryl ethers (6) undergo a facile Claisen rearrangement in N,N-diethylaniline/o-dichlorobenzene to give flav-3-enes in good yields.
