Diastereoselective Hydrosilylation of <i>N</i>
-(<i>tert</i>
-Butylsulfinyl)imines Catalyzed by Zinc Acetate
作者:Anna Adamkiewicz、Jacek Mlynarski
DOI:10.1002/ejoc.201501318
日期:2016.2
An efficient zinc-catalyzed diastereoselective hydrosilylation of N-(tert-butylsulfinyl)imines has been developed that does not require the use of ligands or noble metals. A variety of N-(tert-butylsulfinyl)imines were reduced by this protocol in the presence of a catalytic amount of zinc acetate (5 mol-%) to provide the corresponding secondary amines in high yields with excellent diastereoselectivities
已经开发出一种高效的锌催化非对映选择性氢化硅烷化 N-(叔丁基亚磺酰基)亚胺,不需要使用配体或贵金属。在催化量的乙酸锌 (5 mol-%) 存在下,通过该方案还原了各种 N-(叔丁基亚磺酰基)亚胺,以高产率提供相应的仲胺,并具有出色的非对映选择性(高达 98 % de )。通过使用三乙氧基硅烷作为有效的氢源,这种实验上简单的催化过程很容易适用于芳族和脂肪族胺的合成。
NOVEL URACIL COMPOUND OR SALT THEREOF HAVING HUMAN DEOXYURIDINE TRIPHOSPHATASE INHIBITORY ACTIVITY
申请人:Fukuoka Masayoshi
公开号:US20110082163A1
公开(公告)日:2011-04-07
Provided is a uracil compound or a salt thereof, which has potent human dUTPase inhibitory activity and is useful as, for example, an antitumor drug.
A uracil compound represented by the general formula (I) or a salt thereof:
wherein n represents an integer of 1 to 3; X represents a bond, an oxygen atom, a sulfur atom, or the like; Y represents a linear or branched alkylene group having 1 to 8 carbon atoms, or the like; and Z represents —SO
2
NR
1
R
2
or —NR
3
SO
2
—R
4
, wherein R
1
and R
2
each represent an alkyl group having 1 to 6 carbon atoms, an aralkyl group which is optionally substituted, or the like; R
3
represents an alkyl group having 1 to 6 carbon atoms, or the like; and R
4
represents an aromatic hydrocarbon group, an unsaturated heterocyclic group, or the like.
Impregnated Ruthenium on Magnetite as a Recyclable Catalyst for the N-Alkylation of Amines, Sulfonamides, Sulfinamides, and Nitroarenes Using Alcohols as Electrophiles by a Hydrogen Autotransfer Process
作者:Rafael Cano、Diego J. Ramón、Miguel Yus
DOI:10.1021/jo200559h
日期:2011.7.15
acid deprotection gave the expected primary amines in good yields. The ruthenium catalyst is quite sensitive, and small modifications of the reaction medium can change the final product. The alkylation of aminesusing potassium hydroxide renders the N-monoalkylated amines, and the same protocol using sodium hydroxide yields the related imines. The catalyst can be easily removed by a simple magnet and