نتایج جستجو برای: ugi reaction
تعداد نتایج: 412882 فیلتر نتایج به سال:
BACKGROUND Double-contrast upper gastrointestinal barium X-ray radiography (UGI-XR) is one of the most widely conducted gastric cancer screening methods. It has been executed to find gastric cancer, but has not been usually executed to detect premalignant atrophic mucosa of stomach. To understand the meaning of UGI-XR-based atrophic gastritis, we analyzed its association with several causative ...
Topics related with endoscopic ultrasound (EUS) made up considerable portion among many invited lectures presented in International Digestive Endoscopy Network 2012 meeting. While the scientific programs were divided into the fields of upper gastrointestinal (UGI), lower gastrointestinal, and pancreato-biliary (PB) categories, UGI and PB parts mainly dealt with EUS related issues. EUS diagnosis...
Although medical and endoscopic hemostasis is now considered as the first-line therapy for nonvariceal upper gastrointestinal (UGI) bleeding, refractory bleeding still occurs in 5%-10% of the patients. In these patients, transcatheter arterial embolization (TAE) or surgery is required, but research on embolization for unmanageable UGI bleeding in Korea is scanty. We reviewed the medical records...
A chemo- and regioselective gold-catalyzed tandem 6-endo-dig cyclization/enyne cycloisomerization/1,2-migration process for the synthesis of decorated peptidomimetics is developed. Various migrating groups such as aryl, heteroaryl alkyl are tolerated in this method under mild conditions. This protocol successfully utilized to modify various oligopeptides, including substrates bearing drug amant...
Nonvariceal upper gastrointestinal (UGI) bleeding is a frequent complication with significant morbidity and mortality. Although endoscopic hemostasis remains the initial treatment modality, severe bleeding despite endoscopic management occurs in 5-10% of patients, necessitating surgery or interventional embolotherapy. Endovascular embolotherapy is now considered the first-line therapy for massi...
BACKGROUND Gastrointestinal cancers, including esophageal, gastric, liver and pancreatic are relatively common in Iran. Furthermore, consumption of opium and its derivatives (O&D) are considerable. This study, aimed to examine the association between consumption of O&D and the incidence of upper gastrointestinal (UGI) cancers. METHODS In a matched case-control study in Kerman (located in sout...
An unexpected formation of cyclic α-alkoxy isothioureas has been achieved. As is known, the heterocyclic imines 2,5-dihydro-1,3-thiazoles are convertible to bisamides with the aid of a carboxylic acid and an isocyanide (Ugi reaction). Herein, it is shown that 2,5-dihydro-1,3-thiazole S-monoxides-the respective α-sulfinyl imines-are characterized by an altered reaction behavior. In a hitherto un...
BACKGROUND Discontinuations and/or interruptions in aspirin therapy for secondary cardioprotection due to upper gastrointestinal (UGI) complications or symptoms have been shown to increase the risk for subsequent cardiovascular events. PA32540 is a coordinated-delivery, combination tablet consisting of enteric-coated aspirin (EC-ASA) 325 mg and immediate-release (IR) omeprazole 40 mg. METHODS...
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