Synthetic approaches and applications of sulfonimidates

This review article explores the synthesis of the organosulfur(VI) species named sulfonimidates, focusing on their synthesis from sulfur(II), sulfur(IV) and sulfur(VI) reagents, and investigates their recent resurgeance in interest as intermediates to access other important organosulfur compounds. Sulfonimidates have been utilized as precursors for polymers, sulfoximine and sulfonimidamide drug candidates and as alkyl transfer reagents

Sulfonimidates: useful synthetic intermediates for sulfoximine synthesis via C–S bond formation

The ever-increasing prevalence of sulfoximine derivatives in drug discovery programmes has brought about a renaissance in the development of methods for their synthesis. Sulfoximine synthesis via C-S bond formation however has been comparatively underexplored. Herein, we report that sulfonimidates constitute a versatile precursor for the synthesis of medicinally relevant sulfoximines

General Method for the Asymmetric Synthesis of N–H Sulfoximines via C–S Bond Formation

A versatile method for the synthesis of enantioenriched N–H sulfoximines is reported. The approach stems from the organomagnesium-mediated ring opening of novel cyclic sulfonimidate templates. The reactions proceed in high yield and with excellent stereofidelity with alkyl, aryl, and heteroaryl Grignard reagents. The chiral auxiliary is readily removed from the resultant sulfoximines via an unusual oxidative debenzylation protocol that utilizes molecular oxygen as the terminal oxidant. This provides a general strategy for the synthesis of highly enantioenriched N–H sulfoximines

Complete ¹H and 13C NMR structural assignments for a group of four goyazensolide-type furanoheliangolides

Four goyazensolide-type sesquiterpene lactones - lychnofolide, centratherin, goyazensolide and goyazensolide acetate - were thoroughly studied by NMR experimental techniques. ¹H NMR, 13C NMR {¹H}, COSY, HMQC, HMBC, J-res. and NOE experiments were performed to provide the needed structural information. Complete and unequivocal assignment, including the determination of all multiplicities, was obtained for each structure and the data collections are presented in tables

Cardiomiopatia de Takotsubo: características clínicas e fisiopatologia: revisão sistemática: Takotsubo cardiomyopathy: clinical features and pathophysiology: a systematic review

A cardiomiopatia de Takotsubo diz respeito a uma forma aguda e reversível da insuficiência cardíaca em que muitas das vezes está correlacionada com a síndrome coronariana aguda. Essa pesquisa tem como objetivo evidenciar as características clínicas e a fisiopatologia da cardiomiopatia de Takotsubo. Trata-se de uma Revisão Integrativa da Literatura. Foram encontrados 4 artigos, sendo 3 desses relatos de caso. Após análise e interpretação dos dados, concluiu-se que a cardiomiopatia de Takotsubo apresenta características clínicas que podem se confundir a outras doenças coronarianas, por isso é essencial o diagnóstico diferencial. Percebe-se a necessidade de mais estudos referentes à temática da cardiomiopatia de Takotsubo

NEOTROPICAL CARNIVORES: a data set on carnivore distribution in the Neotropics

Mammalian carnivores are considered a key group in maintaining ecological health and can indicate potential ecological integrity in landscapes where they occur. Carnivores also hold high conservation value and their habitat requirements can guide management and conservation plans. The order Carnivora has 84 species from 8 families in the Neotropical region: Canidae; Felidae; Mephitidae; Mustelidae; Otariidae; Phocidae; Procyonidae; and Ursidae. Herein, we include published and unpublished data on native terrestrial Neotropical carnivores (Canidae; Felidae; Mephitidae; Mustelidae; Procyonidae; and Ursidae). NEOTROPICAL CARNIVORES is a publicly available data set that includes 99,605 data entries from 35,511 unique georeferenced coordinates. Detection/non-detection and quantitative data were obtained from 1818 to 2018 by researchers, governmental agencies, non-governmental organizations, and private consultants. Data were collected using several methods including camera trapping, museum collections, roadkill, line transect, and opportunistic records. Literature (peer-reviewed and grey literature) from Portuguese, Spanish and English were incorporated in this compilation. Most of the data set consists of detection data entries (n = 79,343; 79.7%) but also includes non-detection data (n = 20,262; 20.3%). Of those, 43.3% also include count data (n = 43,151). The information available in NEOTROPICAL CARNIVORES will contribute to macroecological, ecological, and conservation questions in multiple spatio-temporal perspectives. As carnivores play key roles in trophic interactions, a better understanding of their distribution and habitat requirements are essential to establish conservation management plans and safeguard the future ecological health of Neotropical ecosystems. Our data paper, combined with other large-scale data sets, has great potential to clarify species distribution and related ecological processes within the Neotropics. There are no copyright restrictions and no restriction for using data from this data paper, as long as the data paper is cited as the source of the information used. We also request that users inform us of how they intend to use the data

Characterisation of microbial attack on archaeological bone

As part of an EU funded project to investigate the factors influencing bone preservation in the archaeological record, more than 250 bones from 41 archaeological sites in five countries spanning four climatic regions were studied for diagenetic alteration. Sites were selected to cover a range of environmental conditions and archaeological contexts. Microscopic and physical (mercury intrusion porosimetry) analyses of these bones revealed that the majority (68%) had suffered microbial attack. Furthermore, significant differences were found between animal and human bone in both the state of preservation and the type of microbial attack present. These differences in preservation might result from differences in early taphonomy of the bones. © 2003 Elsevier Science Ltd. All rights reserved