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铱催化叔酰胺与呋喃硅醚间的类插烯Aldol缩合反应:γ-亚苄基-丁烯酸内酯的合成
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作者 何倩 李杰 +3 位作者 喻思佳 吴东坪 叶剑良 黄培强 《化学学报》 SCIE CAS CSCD 北大核心 2023年第10期1265-1270,共6页
γ-亚烷基-丁烯酸内酯是许多具有重要生理活性天然产物的结构单元.本工作通过铱催化N,N-二甲基芳基甲酰胺与呋喃硅醚间的类插烯Aldol缩合反应,成功地实现了温和条件下γ-亚苄基-丁烯酸内酯的合成.反应对硝基、氰基、乙烯基、三氟甲基等... γ-亚烷基-丁烯酸内酯是许多具有重要生理活性天然产物的结构单元.本工作通过铱催化N,N-二甲基芳基甲酰胺与呋喃硅醚间的类插烯Aldol缩合反应,成功地实现了温和条件下γ-亚苄基-丁烯酸内酯的合成.反应对硝基、氰基、乙烯基、三氟甲基等吸电子基取代的苯甲酰胺底物有很好的适用性.γ-亚苄基-丁烯酸内酯经Pd/C氢化反应即可转化为作为众多活性天然产物的核心骨架的γ-苄基丁内酯.本工作还对Z型和E型γ-亚苄基-丁烯酸内酯的特征^(1)H NMR谱峰的化学位移分布规律进行总结比较,利用这些规律可以很方便地区分Z、E两种异构体. 展开更多
关键词 叔酰胺 酰胺活化 类插烯aldol缩合 γ-亚苄基-丁烯酸内酯 铱催化
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Impact of Malnutrition on Contrast-associated Acute Kidney Injury and follow-up mortality in Patients undergoing Coronary Angiography
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作者 凌翊航 贺亦波 +2 位作者 喻思佳 刘勇 陈纪言 《South China Journal of Cardiology》 CAS 2022年第4期254-262,共9页
Background Malnutrition is prevalent in patients with coronary disease. However, it’s unknown whether malnutrition would affect the risk of CA-AKI in patients undergoing coronary angiography(CAG). Methods We included... Background Malnutrition is prevalent in patients with coronary disease. However, it’s unknown whether malnutrition would affect the risk of CA-AKI in patients undergoing coronary angiography(CAG). Methods We included patients with documented data for calculating controlling nutritional status(CONUT) score from a prospective multicenter cohort study(REICIN study) recruiting 4271 consecutive patients undergoing CAG(with or without percutaneous coronary intervention) from January 2013 to February 2016(NCT01402232). Patients were stratified as normal group(CONUT score 0-1), mild malnutrition group(CONUT score 2-4) and severe malnutrition group(CONUT score>4). CA-AKI was defined as an increase of serum creatinine level of >0.3 mg/d L or >50% within the first 48 hours since the procedure. The association of malnutrition and the risk of CA-AKI was examined by multivariable logistics regression analysis. 3862 patients undergoing CAG(median age: 63.1 ±10.7 years, 76.7% were male) were finally included in this study. Results Overall, 1769(45.8%) patients were complicated with mild malnutrition, 386(10.0%) were with severe malnutrition and 127(3.3%) patients eventually developed CA-AKI. The patients in severe malnutrition status were older, with worse cardiorenal function and had higher CA-AKI incidence than those without malnutrition. Adjusted multivariate logistic regression analysis demonstrated that mild malnutrition was 1.76-fold(95% CI 1.07-2.95) and the severe malnutrition was 2.77-fold(95%CI 1.41-5.37) higher risk of CA-AKI(all P<0.05, respectively) compared with patients in normal nutrition status.In addition, malnutrition level was also associated with an elevated risk of follow-up all-cause mortality(Log-Rank P<0.001). Conclusion Malnutrition is prevalent and associated with increased risk of CA-AKI among patients undergoing CAG. 展开更多
关键词 Contrast-associated acute kidney injury MALNUTRITION MORTALITY
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