A facile direct conversion of aldehydes to esters and amides using acetone cyanohydrin
作者:I. Victor Paul Raj、A. Sudalai
DOI:10.1016/j.tetlet.2005.09.173
日期:2005.11
electron-withdrawing groups undergo rapid reactions with a variety of alcohols and secondary amines to afford the corresponding esters and amides, respectively, in high yields, when treated with NaCN or acetonecyanohydrin and base under ambient reaction conditions. In case of α,β-unsaturated aldehydes, simultaneous reduction of the CC bond along with esterification occurred to produce the saturated esters in high
ANTICANCER 1,3-DIOXANE-4,6-DIONE DERIVATIVES AND METHOD OF COMBINATORIAL SYNTHESIS THEREOF
申请人:National Guard Health Affairs
公开号:US20200290975A1
公开(公告)日:2020-09-17
Compounds, methods of synthesis, and methods of cancer treatment by arylidene-1,3-dioxane-4,6-diones. A Meldrum's acid-based chemistry and hybrid solid-liquid method. The method includes protection of ketone and aldehyde components and simultaneous immobilization on the solid phase, introduction of substituents, grafts and derivatives compatible with the protection, detachment and restoration of active carbonyl reactivity, reaction of ketone library with malonate, reacting of the products with the aldehyde library in liquid phase and separation of the products by preparative HPLC.
Regioselective Disulfide-Catalyzed Photocatalytic Oxidative Cleavage of 1-Arylbutadienes to Cinnamaldehydes
作者:Rodney A. Fernandes、Praveen Kumar、Amit Bhowmik、Dnyaneshwar A. Gorve
DOI:10.1021/acs.orglett.2c00884
日期:2022.5.20
regioselective oxidativecleavage of 1-arylbutadienes to cinnamaldehydes. This methodology illustrates mild reaction conditions, ambient temperature, excellent regioselectivity, and compatibility with wide range of functional groups (38 examples). The method gains significance, as few reports with limited substrate scope are available for such excellent photocatalytic oxidativecleavage of conjugated
作者:Yuyang Dong、Kwangmin Shin、Binh Khanh Mai、Peng Liu、Stephen L. Buchwald
DOI:10.1021/jacs.2c07489
日期:2022.9.14
The enantioselective installation of a methyl group onto a small molecule can result in the significant modification of its biological properties. While hydroalkylation of olefins represents an attractive approach to introduce alkyl substituents, asymmetric hydromethylation protocols are often hampered by the incompatibility of highly reactive methylating reagents and a lack of general applicability
将甲基对映选择性安装到小分子上可以导致其生物学特性的显着改变。虽然烯烃加氢烷基化是引入烷基取代基的一种有吸引力的方法,但不对称加氢甲基化方案常常因高反应性甲基化试剂的不相容性和缺乏普遍适用性而受到阻碍。在此,我们报道了一种由 CuH 催化实现的不对称烯烃氢甲基化方案。该方法利用甲苯磺酸甲酯作为与还原性含碱反应环境相容的甲基源,同时催化量的碘离子将甲苯磺酸甲酯原位转化为活性反应物碘甲烷,以促进加氢甲基化。该方法可耐受多种官能团、杂环和药学相关框架。密度泛函理论研究表明,立体选择性加氢后,甲基化步骤是立体保留的,通过碘甲烷的S N 2 型氧化加成机制进行,然后进行还原消除。
Anticancer 1,3-dioxane-4,6-dione derivatives and method of combinatorial synthesis thereof
申请人:National Guard Health Affairs
公开号:US11161823B2
公开(公告)日:2021-11-02
Compounds, methods of synthesis, and methods of cancer treatment by arylidene-1,3-dioxane-4,6-diones. A Meldrum's acid-based chemistry and hybrid solid-liquid method. The method includes protection of ketone and aldehyde components and simultaneous immobilization on the solid phase, introduction of substituents, grafts and derivatives compatible with the protection, detachment and restoration of active carbonyl reactivity, reaction of ketone library with malonate, reacting of the products with the aldehyde library in liquid phase and separation of the products by preparative HPLC.