N-Protection Dependent Phosphorylation of Dehydroamino Acids to Build Unusual Phosphono-Peptides.

An efficient Mn(III)-promoted phosphorylation of dehydroalanine (Dha) has been developed to give unusual α-amino acids bearing phosphonates/phosphine oxides and β-vinyl phosphonates/phosphinates depending on N-protection of amino acid. N,N-diprotected dehydroalanine reacted with H-phosphonates and H-phosphine oxides to give structurally diverse phosphorylated α-amino acids through conjugate addition of phosphorous radical generated by Mn(OAc).2HO.

Type 2 Diabetes Mellitus Prevalence and Associated Risk Factors in Postmenopausal Women.

Introduction Type 2 diabetes mellitus (T2DM) is the most common problem in postmenopausal women. This study aimed to find out the prevalence of T2DM and its risk factors in postmenopausal women. Methods The study is a population-based cross-sectional study.

Characterization and antimicrobial evaluation of anthraquinones and triterpenes from .

Chemical investigation of roots of the plant, Linn, led to the isolation of an undescribed anthraquinone, cordifoquinone R, determined as 1,2-dihydroxy-6-methoxyanthracene-9,10-dione ( based on the 1D and 2D NMR analyses and HRESIMS. Ten other known compounds 1,4-dihydroxy-2-methoxyanthracene-9,10-dione (), rubiadin (), xanthopurpurin (), 1-methoxy-3-hydroxy-2-carbomethoxy-9,10-anthraquinone (), alizarin (), β-sitosterol glucoside (), scopoletin (), oleanolic acid, (), pomolic acid (), queretaroic acid () were also isolated. Out of these compounds, , , and are first reported from this plant species.