Alkylation of 5-substituted NH-tetrazoles by alcohols in the superacid CF3SO3H
作者:Anna D. Lisakova、Dmitry S. Ryabukhin、Rostislav E. Trifonov、Vladimir A. Ostrovskii、Aleksander V. Vasilyev
DOI:10.1016/j.tetlet.2015.11.005
日期:2015.12
Reactions of 5-substituted NH-tetrazoles with alcohols in the superacid CF3SO3H have been studied. Both the structure of the tetrazole and the nature of alcohol were found to dramatically influence the selectivity of the reaction and yields of products. Tetrazoles bearing phenyl, electron-donating aryl, or benzyl groups at the 5-position, have been alkylated using various alcohols (including MeOH and EtOH) in CF3SO3H upon heating at 60 degrees C for 0.3-12 h to afford 2-alkyl-2H-tetrazoles in 30-98% yields. (C) 2015 Elsevier Ltd. All rights reserved.
Additions of 5-phenyltetrazole and other heterocyclic NH compounds to olefins
作者:Alan R. Katritzky、Ming Qi、Adam P. Wells
DOI:10.1007/bf01169962
日期:——
POLISHING COMPOSITION, METHOD FOR PRODUCING SAME, POLISHING METHOD, AND METHOD FOR PRODUCING SUBSTRATE
申请人:FUJIMI INCORPORATED
公开号:US20190085208A1
公开(公告)日:2019-03-21
To provide a polishing composition capable of polishing objects to be polished, such as simple substance silicon, silicon compounds, and metals, at a high polishing removal rate.
The polishing composition contains a polishing removal accelerator containing a compound having a ring structure configured to contain four or more nitrogen atoms, abrasives, and a liquid medium.