4H-3,1-benzoxazines from benzyl cyclopropanes. First example of acid catalyzed rearrangement in <Emphasis Type="Italic">ortho</Emphasis>-substituted benzylcyclo-propanes

The synthesis of 2-N-acylamino-substituted benzylcyclopropanes has been carried out. It was established that under the action of acids 2-N-acylamino-substituted benzylcyclopropanes are rearranged into the corresponding 4H-3,1-benzoxazines and not into the expected 3,1-benzoxazepines. It was shown that a similar type of rearrangement is also characteristic for 2-N-acylamino-substituted allylbenzenes.     

Electrochemical concept of scanning tunnel microscopy and scanning tunnel spectroscopy

The history of investigation, development and application of electrochemical scanning tunneling microscopy (ESTM) are reviewed.     

Synthesis and molecular structure of 1-(2-pyridyloxy)silatrane

1-(2-Pyridyloxy)silatrane was synthesized by trans-etherification of 1-ethoxysilatrane with 2-hydroxypyridine as well as by the reaction of the latter with tetraethoxysilane and triethanolamine. Its structure was established by the XRD analysis of a single crystal, and in solution using the methods of ¹H, ¹³C, ²⁹Si NMR and IR spectroscopy.