Nanocrystalline copper(II) oxide efficiently catalyzed the conjugate addition of aliphatic amines to α,β-unsaturated compounds to produce β-amino compounds with excellent yields under mild reaction conditions. Similarly, Glycine esters are obtained in good yields by the insertion of α-diazoacetate into N–H bonds of amines. The catalyst is used for three cycles with minimal loss of activity.
NITROGEN-CONTAINING FLUOROKETONES FOR HIGH TEMPERATURE HEAT TRANSFER
申请人:FLYNN Richard M.
公开号:US20110232870A1
公开(公告)日:2011-09-29
Nitrogen-containing fluorochemical ketones are provided that can be useful in apparatuses that includes a device and a mechanism for transferring heat. The provided fluorochemical ketones are stable at temperatures above 170° C., are environmentally friendly, and are economical to produce. The provided apparatuses can be useful for vapor phase soldering of electronic devices.
Chemical mechanical planarization for tungsten-containing substrates
申请人:AIR PRODUCTS AND CHEMICALS, INC.
公开号:EP2779217A2
公开(公告)日:2014-09-17
Chemical mechanical polishing (CMP) compositions for polishing tungsten or tungsten-containing substrates comprise an abrasive, at least one solid catalyst, a chemical additive selected from the groups consisting of piperazine derivatives, salts of cyanate, and combinations thereof; and a liquid carrier. Systems and processes use the aqueous formulations for polishing tungsten or tungsten-containing substrates.
Derivatives of Piperazine. IV. Reactions with Derivatives of Monochloroacetic Acid
作者:David E. Adelson、C. B. Pollard
DOI:10.1021/ja01310a031
日期:1935.7
Ruthenium(III) chloride-catalyzed efficient protocol for ethyl diazoacetate insertion into the N–H bond of secondary amines
作者:Ravi Varala、Ramu Enugala、Srinivas R. Adapa
DOI:10.1007/s00706-008-0927-z
日期:2008.11
Ruthenium(III) chloride (1 mol%) alone can catalyze the insertion of ethyl diazoacetate into N-H bonds of various structurally and electronically diverse secondary cyclic amines under solvent-free conditions to afford the corresponding glycine esters in good yields under ambient conditions. Reactions with various aliphatic primary and aromatic amines examined, however, were unsuccessful.