4217-62-3Relevant articles and documents
A novel photodimerization of 4-aryl-4H-pyrans for cage compounds
Xin, Hongxing,Zhu, Xiaohe,Yan, Hong,Song, Xiuqing
, p. 3325 - 3328 (2013)
Irradiation of 4-aryl-4H-pyrans in either the solid state or in solution gave rise to the formation of novel oxa-cage compounds, 3,9-dioxatetraasteranes, derived from a double [2 + 2] cycloaddition reaction. Meanwhile, an unexpected oxetane formed by the Paternò-Büchi reaction of benzophenone with the pyrans, was established by 1H NMR data as well as by X-ray crystallographic analysis. Experimental observations and theoretical calculations confirmed that the photodimerization was effectively catalyzed by the triplet excited state of benzophenone, while the Paternò-Büchi reaction was competitive with the process.
Bradshaw
, p. 504 (1973)
GaN nanowires as a reusable photoredox catalyst for radical coupling of carbonyl under blacklight irradiation
Botton, Gianluigi,Cen, Yunen,Cheng, Shaobo,Li, Chao-Jun,Liu, Mingxin,Mi, Zetian,Rashid, Roksana T.,Tan, Lida
, p. 7864 - 7870 (2020/08/19)
Employing photo-energy to drive the desired chemical transformation has been a long pursued subject. The development of homogeneous photoredox catalysts in radical coupling reactions has been truly phenomenal, however, with apparent disadvantages such as the difficulty in separating the catalyst and the frequent requirement of scarce noble metals. We therefore envisioned the use of a hyper-stable III-V photosensitizing semiconductor with a tunable Fermi level and energy band as a readily isolable and recyclable heterogeneous photoredox catalyst for radical coupling reactions. Using the carbonyl coupling reaction as a proof-of-concept, herein, we report a photo-pinacol coupling reaction catalyzed by GaN nanowires under ambient light at room temperature with methanol as a solvent and sacrificial reagent. By simply tuning the dopant, the GaN nanowire shows significantly enhanced electronic properties. The catalyst showed excellent stability, reusability and functional tolerance. All reactions could be accomplished with a single piece of nanowire on Si-wafer. This journal is
Silver(I)-Catalyzed Widely Applicable Aerobic 1,2-Diol Oxidative Cleavage
Zhou, Zhong-Zhen,Liu, Mingxin,Lv, Leiyang,Li, Chao-Jun
supporting information, p. 2616 - 2620 (2018/02/13)
The oxidative cleavage of 1,2-diols is a fundamental organic transformation. The stoichiometric oxidants that are still predominantly used for such oxidative cleavage, such as H5IO6, Pb(OAc)4, and KMnO4, generate stoichiometric hazardous waste. Herein, we describe a widely applicable and highly selective silver(I)-catalyzed oxidative cleavage of 1,2-diols that consumes atmospheric oxygen as the sole oxidant, thus serving as a potentially greener alternative to the classical transformations.
