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The role of Cul in the siloxane-mediated Pd-catalyzed cross-coupling reactions of aryl iodides with aryl lithium reagents

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Chinese Chemical Letters 2021年第1期32卷 441-444页

作者： Yu Chen Xiao Zhang Fang Liu Gucheng He Ju Zhang K.N.Houk amos bsmith iii Yong Liang State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Department of Chemistry University of PennsylvaniaPA 19104United States Department of Chemistry and Biochemistry University of CaliforniaCA 90095United States

Experiments indicate that a catalytic amount of Cul plays an important role in the siloxane-mediated Pd-catalyzed cross-coupling reactions with the direct use of organolithium *** of organolithium to the siloxane transfer agent generates an organosilicon *** calculations indicate that Cul initially accelerates the Si-Pd(Ⅱ) transmetalation of the organosilicon intermediate by the formation of CuI_(2)^(-).Subsequently,CuI_(2)^(-)works as a shuttle between the Si-Cu(Ⅰ) and Cu(Ⅰ)-Pd(Ⅱ)transmetalation processes.

关键词： Cross-coupling CuI DFT calculation Reaction mechanism Transmetalation

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Acute Bowel Obstructions of the Elderly in a Low African Country

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Surgical Science 2022年第3期13卷 164-173页

作者： Kouame Bernadin Kouakou Kouakou Ibrahim Anzoua Mamadou Traore Ismael Kalou Leh Bi Ahou Bernadette N’Dri Aka Gerard Kakou Serge amos Ekra Blaise amos Kouakou Inza Bamba Djahou Ezechiel Akowendo Roger Lebeau Bamourou Diane General and Digestive Surgery Department University Hospital of Bouaké Bouake Ivory Coast

Background: Acute bowel obstruction is one of the main causes of non-traumatic gastro—intestinal surgical emergencies. When they occur in elderly patients, they seem to induce higher morbi-mortality. The aim of our study was to identify the causes of these bowel obstructions in elderly patients and to expose the results of their surgical management. Patients and Methods: Retrospective and analytical study of patients aged 65 years and over, operated on between January 2013 and December 2019 for acute bowel obstruction at the University Hospital of Bouake. Demographic, diagnostic, therapeutic and evolutionary data were analysed. Results: The study involved 36 men and 23 women (sex ratio = 1.6). The mean age of these patients was 70 ± 4.6 years (65 and 90 years). A history and/or co-morbidities were found in 67.8% of them. Patients were classified as ASA I (20.3%), ASA II (42.4%), ASA iii (33.9%) or ASA IV (3.4%). The average consultation time was 5.3 ± 4.1 days (2 days and 28 days). Bowel obstructions were due to colonic volvulus (38.9%), colonic cancer (22%), postoperative adhesions (18.6%), strangulated groin hernia (16.9%) or internal bowel hernia (3.3%). Volvulated or necrotic bowel and resectable cancers were resected followed by immediate anastomosis or stoma. Near upstream stomas were performed for unresectable cancers. A herniorrhaphy for groin hernias and a mesenteric breach suture for internal hernia were performed after bowel disinterment. Adhesions were released. The time to surgery was 22.3 ± 12.4 hours (2 hours and 72 hours). The post-surgery morbidity was 32.2%, marked by parietal suppurations (47.4%). The post-surgery mortality was 16.9%. Hemodynamic or septic shock, ASA score ≥ iii, bowel necrosis and ICU stay were the significant risk factors. Conclusion: Acute bowel obstructions in the elderly are dominated by colonic volvulus. The high mortality is related to various factors highlighting the frailty of the elderly. A multidisciplinary management i

关键词： Acute Bowel Obstruction Elderly Etiology Morbi Mortality Surgery

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Fibrin sealant for esophageal anastomosis:A phase II study

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World Journal of Gastrointestinal Oncology 2020年第6期12卷 651-662页

作者： Yao-Bin Lin Jian-Hua Fu Yan Huang Yi-Huai Hu Kong-Jia Luo Ke-Xi Wang amosÉla Bella Dong-Rong Situ Ji-Yang Chen Ting Lin Xavier B D’Journo Nuria M Novoa Alessandro Brunelli Hiran C Fernando Robert J Cerfolio Mahmoud Ismail Hong Yang 无 Department of Thoracic Surgery State Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangdong Esophageal Cancer InstituteSun Yat-sen University Cancer CenterGuangzhou 510060Guangdong ProvinceChina Department of Thoracic Surgery Avicenne HospitalBobigny 93000France Department of Surgery and Specialties Faculty of Medicine and Biomedical SciencesUniversity of YaoundéIYaoundéCameroon Department of Surgery Royal Darwin HospitalNorthern Territory 0811Australia Department of Thoracic Surgery and Diseases of Esophagus Aix-Marseille UniversityHôpital NordMarseille 13915France Thoracic Surgery Service University Hospital of SalamancaSalamanca 37007Spain Department of Thoracic Surgery St James's University HospitalLeeds LS97TFUnited Kingdom Section of Thoracic Surgery Inova Fairfax Medical CenterInova Schar Cancer InstituteFalls ChurchVA 22042United States Department of Cardiothoracic Surgery New York University Langone HealthNew YorkNY 10016United States Department of Thoracic Surgery Academic Hospital of the Charité–UniversitätsmedizinHumboldt University BerlinBerlin 10117Germany the AME Thoracic Surgery Collaborative Group

BACKGROUND Esophagectomy is a pivotal curative modality for localized esophageal or esophagogastric junction cancer(EC or EJC).Postoperative anastomotic leakage(AL)remains *** use of fibrin sealant(FS)may improve the strength of esophageal anastomosis and reduce the incidence of *** To assess the efficacy and safety of applying FS to prevent AL in patients with EC or *** In this single-arm,phase II trial(*** identifier:NCT03529266),we recruited patients aged 18-80 years with resectable EC or EJC clinically staged as *** open or minimally invasive McKeown esophagectomy was performed with a circular stapled *** performing the anastomosis,2.5 mL of porcine FS was applied *** primary endpoint was the proportion of patients with AL within 3 *** From June 4,2018,to December 29,2018,57 patients were *** the data cutoff date(June 30,2019),three(5.3%)of the 57 patients had developed AL,including two(3.5%)with esophagogastric AL and one(1.8%)with gastric *** incidence of anastomotic stricture and other major postoperative complications was 1.8%and 17.5%,*** median time needed to resume oral feeding after operation was 8 d(Interquartile range:7.0-9.0 d).No adverse events related to FS were *** deaths occurred within 90 d after *** Perioperative sealing with porcine FS appears safe and may prevent AL after esophagectomy in patients with resectable EC or *** phase iii studies are warranted.

关键词： Esophageal cancer McKeown esophagectomy Fibrin sealant Anastomotic leakage Postoperative complications Prevention

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