The aza-Wittig reactions of iminophosphorane 3 with aromatic isocyanates generated carbodiimides 4, which were reacted with alkylamines under mild conditions to give a series of 2-(alkylamino)-5,6-dimethylthieno[2,3-d]pyrimidin-4(3H)-ones 6 and 8 in cga 200 to cga 510 adapter satisfactory yield.Their structures were confirmed by 1H NMR, EI-MS, IR a
The level of progress of human civilization what it is now has been possible for, among other issues, the ever increasing use of pesticides in agriculture.The use of pesticides has made it easy to meet the target of one of the basic need i.e.food of such a huge population.Without the use read more of pesticides we may have to starve to death due to
Abstract Important role of flowering genes in enhancing grain productivity in rice has become well recognized for a number of key genes regulating the florigen production, but little has been known for the two florigen genes themselves.In this study, pleiotropism of Rice Flowering Locus T 1 (RFT1), one of the two florigen genes in rice, was firstly
Abstract In recent years, abundant natural gas has been found in microbial carbonates in the fourth member of the Leikoupo Formation in Western Sichuan Basin.In this study, from the observation of 626 microbial thin sections, four types of microbial carbonates are classified based on the differences of mesostructures.Among them, thrombolites and st