Title of article
Cyclisation of benzo[b]thiophen-3(2H)-one 1,1-dioxide and 1,3-indanedione into novel methylene bridged polycyclic diazocines and their rearrangement into spirocyclic compounds
Author/Authors
Brigita Cekavicus، نويسنده , , Brigita and Vigante، نويسنده , , Brigita and Rucins، نويسنده , , Martins and Plotniece، نويسنده , , Aiva and Pajuste، نويسنده , , Karlis and Petrova، نويسنده , , Marina and Belyakov، نويسنده , , Sergey and Duburs، نويسنده , , Gunars and Sobolev، نويسنده , , Arkadij، نويسنده ,
Issue Information
هفته نامه با شماره پیاپی سال 2014
Pages
4
From page
4601
To page
4604
Abstract
Methylene bridged polycyclic diazocines 2a and 2b were obtained in reactions of 1,3-indanedione, or benzo[b]thiophen-3(2H)one-1,1-dioxide, or 2,2′-methylene derivatives 3a,b with paraformaldehyde and ammonia or hexamethylenetetramine in acidic medium. A structural revision of methylene bridged benzothieno-diazocine 2b based on results of X-ray diffraction analysis is presented. Internal rearrangement of methylene bridged polycyclic diazocines into spiroheterocycles 4a,b is also described.
Keywords
Internal rearrangement , Structure revision , Mannich reaction , Spiroheterocycle , Methylene bridged polycyclic diazocine
Journal title
Tetrahedron Letters
Serial Year
2014
Journal title
Tetrahedron Letters
Record number
1890376
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