Revitalization by oxygen: A rhodium(III)-catalyzed oxidative CH/NH activation/annulation sequence provided access to a variety of substituted 1,2-benzothiazine derivatives from readily available NH-sulfoximines and alkynes (see scheme; Cp*=C5 Me5 ). The oxidation system consisted of molecular oxygen in combination with a catalytic amount of Fe(OAc)2 .

BackgroundSocial media has revolutionized the way people communicate, and it has been widely incorporated into medical practice. However, limited data are available regarding the use of social media by Chinese urologists in their practice.MethodsFrom 2014 to 2016, during the China Urological Association’s (CUA) Annual National Minimally Invasive Urology Academic Conference, an anonymous survey on social media usage was distributed to participant urologists.ResultsThe results of the survey, which was completed by 665 participants, indicate a conspicuous increase in social media use during the last three years. Regression analysis showed that year (2014 compared to 2016 and 2015), institute location (in the eastern region of China) and age (<35 y) were independent predictors of social media use. Rather than for personal use, an increasing number of respondents said they used social media for professional purposes, and for most respondents, social media has had a positive impact on their practice. However, when posting information on social media, few respondents were aware of the issue of protecting patients’ privacy.ConclusionsOur study demonstrates a dramatic increase in social media use among Chinese urologists, which provides great opportunities for online academic communication and medical education. However, unprofessional use of social media in the medical practice may bring about potential risks and challenges for the further development of social media in medical practice.

A 'Cu'te couple: A synthetically useful protocol for the preparation of N‐alkynylated sulfoximines (yne sulfoximines) has been developed. The method involves a mild copper‐catalyzed oxidative cross‐coupling of NH‐sulfoximines and terminal alkynes (see scheme). The corresponding N‐acyl sulfoximines were also obtained selectively after acid‐catalyzed hydrolysis of the yne sulfoximines.

N-Alkynylated sulfoximines have been obtained by copper-catalyzed cross-coupling reactions starting from NH-sulfoximines and bromoacetylenes in moderate to good yields. The reaction conditions are mild, and the substrate scope is wide.

We have developed a general and efficient method for copper-catalyzed amidation of saturated C-H bonds under mild conditions, and the used substrates include benzylic reagents, the N, N-dimethylaniline derivatives, the free carboxamides, and sulfonamides. The protocol uses inexpensive and readily available CuBr/ N-halosuccinimide (NBS or NCS) as the catalyst/oxidant, so it provides practical applications for synthesis of various amides via C-H activation.

An oxidative cross-coupling reaction between aldehydes and sulfoximines involving dual C À H/N À H functionalization has been developed. This reaction process is facilitated by a simple copper catalyst (1 mol% loading) and tert-butyl hydroperoxide (TBHP) as the oxidant and proceeds under mild reaction conditions to afford a series of valuable N-acylated sulfoximine derivatives in excellent yields.

A method to access α‐thioaryl ketones and α‐thioaryl esters employing copper acetate (hydrate) as catalyst and readily accessible diaryl disulfides and β‐diketones (or β‐keto esters) has been developed. Both alkyl‐ and aryl‐substituted carbonyl compounds can be prepared.magnified image

In solution the PCy3/B(C6F5)3 pair is rapidly deactivated by nucleophilic aromatic substitution. In the solid state (or in a fluorous liquid), however, it serves as an active frustrated Lewis pair to effectively split dihydrogen.