A compound represented by the following Formula (1) that is effective for the treatment of Paget's disease of bone or hypercalcemia or a medically acceptable solvate thereof;
[wherein R
1
refers to hydrogen atom, C
1
-C
6
alkyl group optionally substituted with hydrogen group or C
1
-C
6
alkoxy group optionally substituted with hydroxyl group, R
2a
and R
2b
refer to hydrogen atom, C
1
-C
10
alkyl group optionally substituted with hydroxyl group, C
6
-C
10
aryl group optionally substituted with hydroxyl group or C
7
-C
12
aralkyl group optionally substituted with a hydroxyl group, or are combined to represent ethylene group. However, a compound in which R
1
is a hydrogen atom or a methyl group and R
2a
and R
2b
are hydrogen atoms is excluded].
US9073885B2
申请人:——
公开号:US9073885B2
公开(公告)日:2015-07-07
Catalytic Cleavage of C(<i>sp</i><sup>2</sup>)–C(<i>sp</i><sup>2</sup>) Bonds with Rh-Carbynoids
作者:Zhaofeng Wang、Liyin Jiang、Pau Sarró、Marcos G. Suero
DOI:10.1021/jacs.9b08632
日期:2019.10.2
We report a catalytic strategy that generates rhodium-carbynoids by selective diazo activation of designed carbyne sources. We found that rhodium-carbynoid species provoke C(sp2)-C(sp2) bond scission in alkenes by inserting a monovalent carbon unit between both sp2-hybridized carbons. This skeletal remodeling process access synthetically useful allyl cation intermediates that conduct to valuable allylic
Treatment of ethyl α-(bromomethyl)acrylate with Cr(II) reagent derived from CrCl3 and LiAlH4 produces allylic chromium species which add to aldehydes efficiently to give α-methylene-γ-butyrolactones stereoselectively.