833-43-2Relevant articles and documents
Scandium(III) trifluoromethanesulfonate catalyzed aromatic nitration with inorganic nitrates and acetic anhydride
Kawada, Atsushi,Takeda, Shigemitsu,Yamashita, Kazumi,Abe, Hitoshi,Harayama, Takashi
, p. 1060 - 1065 (2007/10/03)
The rare earth metal(III) trifluoromethanesulfonate (rare earth metal(III) triflate, RE(OTf)3) was found to be an efficient catalyst for aromatic nitration with carboxylic anhydride-inorganic nitrate as the nitrating agent. In the presence of a catalytic amount of RE(OTf)3, the nitration of substituted benzenes proceeded to afford the corresponding nitrobenzenes. Especially, scandium(III) trifluoromethanesulfonate (scandium(III) triflate, Sc(OTf)3) is the most active catalyst among our tested Lewis acids. It was also found that acetic anhydride-Al(NO 3) · 9H2O is the most active nitrating agent in this system.
Synthesis of terphenylboronic acid derivatives and recognition of anomers of 2-deoxyribofuranoside
Yamashita, Hiroshi,Amano, Koji,Shimada, Satoru,Narasaka, Koichi
, p. 537 - 538 (2007/10/03)
A terphenylboronic acid 1 and its silylated derivative 2 are prepared from (2-nitrophenyl)acetic acid for the purpose of controlling stereochemistry of synthetic organic reactions. These boronic acids are found to recognize α and β-anomers of 2-deoxyribofuranosides. That is, when these boron compounds are added to a 1 : 1 mixture of α and β-t-butyl 5-O-benzyl-2-deoxy-D-ribofuranosides, the boronic acids 1 and 2 form the corresponding boronates preferentially with the β-anomer.