Due to the complex dynamic of aeolian and fluvial interacted processes behind the landform development, most of previous works started from classifying the types of landscape characterized by various
Main observation and conclusionrnA convenient synthetic route to 2-heteroaryl-3-hydroxybenzo[b]thiophene derivatives via K2CO3-promoted multicomponent cycliza-tion between o-halogenated benzaldehyde,2-methylquinolines and sulfur powder has been demonstrat
Main observation and conclusionrnSubstantial progresses have been made toward the development of metal-free catalysts for stereoselective ring-opening polymeriza-tion (ROP) of rac-lactide.Yet the discovery of organic catalysts effective at ambient tempera
Main observation and conclusionrnA series of catalysts were prepared for sugar alcohols production to overcome the deficiencies of the previous reported catalysts,such as low yield of sugar alcohols,single function,instability,and controversial role of ac
Main observation and conclusionrnThe synthesis of an Asp lactam derivative of A-183,a selective inhibitor of Factor 7a with good anticoagulant and antithrombotic ac-tivity,is described.Our synthesis depends on the use of a removable backbone modification
This study was conducted on the Ngaoundaba Crater Lake sediments to infer provenance,weathering conditions,organic matter accumulation,and trace metal concentrations.Ngaoundaba Lake sediments were col-lected using a manual core sampler at 5 to 8 m water d
Main observation and conclusionrnAn efficient catalytic system was successfully developed on reduction of N-heteroaromatics with H3N·BH3 as hydrogen source in CuSO4 solution,featuring excellent chemoselectivity as well as very broad functional group toler
Main observation and conclusionrnThe reaction of pyridin-2(1H)-ones with PhlCl2 and NH4SCN enables an efficient regioselective thiocyanation,leading to the synthesis of the biologically interesting C5 thiocyanated 2-pyridones in good to high yields.The me
Main observation and conclusionrnTen new characteristic dihydroagarofuran sesquiterpenoids and three known ones were acquired from the Celastraceae plant Trip-terygium wilfordii.Their structure characterizations were done through spectroscopic data,while