THE SYNTHESIS OF 7-SUBSTITUTED-2,3-DIHYDROPYRIDO[4,3-D]PYRIDAZINE-1,4-DIONES AND 1,4-DIOXO-7-SUBSTITUTED-1,2,3,4-TETRAHYDROPYRIDO[4,3-D]PYRIDAZINE 6-OXIDES FROM METHYL KETONES

A general four-step transformation of alkyl, cycloalkyl, aryl, and heteroaryl methyl ketones via 3-(dimethylamino)-1-substituted-prop-2-en-1-ones, followed by microwave [2+2] cycloaddition of dimethyl acetylenedicarboxylate, read more cyclization of (2E,3E)-2-[(dimethylamino)methylene]-3-(2-substituted)succinates with ammonia or hydroxylamine hydro

Assembly precision optimization is an important means to ensure product accuracy, including two aspects: on the one hand, the relevant deviations of out-of-tolerance key characteristics are reduced to the design tolerance range; on the other hand, the deviation fluctuation range of key characteristics with a large process capability index (Cp) can

In this study, we present an investigation of the optical properties and band structures for the conventional and Fibonacci photonic crystals (PCs) based on some A5B6C7 ferroelectrics (SbSBr and BiTeCl).Here, we use one dimensional click here SbSBr and BiTeCl based layers in air background.We have theoretically calculated the photonic band structur