New and simple protocols are described for the conversion of the enzymatically-derived and enantiomerically pure cis-1,2-dihydrocatechol (X = I) and its 6-methylated derivative into either antipodal form of compounds embodying the tricyclic frameworks of terpenoids . Key steps include intramolecular Diels-Alder (IMDA) and (in some cases) singlet or triplet-based photochemical processes.

<p>Este artigo aborda a diversidade e pluralidade de performances gênero, fazendo um contraponto à crença dominante que há apenas uma possibilidade performance, aquela baseada na cis-heteronormatividade, o torna as formas “diferentes” performar gênero invisíveis ou minorizadas. As pessoas performam identidades fora do padrão “normalidade” não têm reconhecido direito assumir suas da norma ...

This study assessed the effect of processing method on carotenoid profile oil from three varieties Nigerian palm fruits (Elaise guinensis). Specific Elaise guinensis, which are dura, pesifera and tenera were obtained National Institute for Oil Palm Research (NIFOR) in Edo state, Nigeria. The samples divided into two processed using different methods as commonly practiced south-eastern Nigeria, ...

A Safety Science focus on research in the science and technology of human industrial safety. Critical Infrastructures (CIs), as a crucial part urban technological systems, are highly correlated with safety management terms their resilience when cities facing crisis or disaster. According to many studies, indicator-based assessment has been used frequently manage CIs recent decades. Defining cha...

background: this study provided the theoretical basis for program development through a new conceptualization of the concept of family physician related health care. methods: critical interpretive synthesis (cis) was used to carry out qualitative analysis and synthesis of the literature from 2006 until 2015. at the beginning of cis, the search strategy was designed to access electronic database...

amyloid-β (aβ) self-assembly into cross-β amyloidfibrils is implicated in a causative role in alzheimer’s disease pathology.uncertainties persist regarding the mechanisms of amyloid self assembly and the role of metastable prefibrillar aggregates. aβ fibrilsfeature a sheet-turn-sheet motif in the constituent β-strands; as such, turn nucleation has been proposed as a rate-limiting step in the se...

Dinuclear and polymer complexes of 4-phenylpyridine (4-phpy), pyazine (pyz), 4,4′-bipyridine (4,4′-bpy) were prepared by using cis-[Rh2(4-Me-pf)2(O2CR)2] (4-Me-pf- =N,N’-bis(4-methylphenyl)formamidinate anion; R = CF3 CMe3) as precursor dinuclear units. The structures cis-[Rh2II,II(4-Me-pf)2(O2CR)2(4-phpy)2] cis-[Rh2II,III(4-Me-pf)2(O2CCMe3)2(4-phpy)2]BF4 [Rh2II,II(4-Me-pf)2(O2CR)2(L)]n (L pyz ...

Fenestranes are an intriguing class of highly strained molecules possessing a quaternary carbon with bonds that deviate from the canonical tetrahedral geometry. Herein we report the discovery that the natural product pleuromutilin can be used as a structurally complex starting material for the synthesis of a series of bridged cis,cis,cis,cis-[4.5.5.5]- and cis,cis,cis,cis-[4.5.7.5]oxafenestrane...