142114-82-7Relevant articles and documents
Catalytic Staudinger/aza-Wittig sequence by in situ phosphane oxide reduction
Van Kalkeren, Henri A.,Te Grotenhuis, Colet,Haasjes, Frank S.,Hommersom,Rutjes, Floris P. J. T.,Van Delft, Floris L.
, p. 7059 - 7066 (2013/11/06)
A Staudinger/aza-Wittig reaction sequence is described that is catalytic in phosphorus. Towards this end, the phosphane oxide is reduced in situ by diphenylsilane, which allows for substoichiometric amounts of the catalyst 5-phenyldibenzophosphole to be used. The substrate scope is investigated and benzoxazoles, benzodiazepine imidates and a 2-methoxypyrrole were successfully synthesized. These investigations show that a fast aza-Wittig reaction is required to obtain high yields. A catalytic Staudinger/aza-Wittig reaction sequence, involving in situ phosphane oxide reduction, was successfully developed. Benzoxazoles, benzodiazepine imidates and 2-methoxypyrrole were synthesized without phosphane oxide waste products. Copyright
One pot conversion of azido arenes to N-arylacetamides and N-arylformamides: Synthesis of 1,4-benzodiazepine-2,5-diones and fused [2,1-b]quinazolinones
Kamal, Ahmed,Ramana, A. Venkata,Reddy, K. Srinivasa,Ramana, K. Venkata,Hari Babu,Prasad, B. Rajendra
, p. 8187 - 8190 (2007/10/03)
Sodium iodide in acidic media has been employed for the synthesis of N-arylformamides and N-arylacetamides. The NaI/acetic acid reagent system has also been extended for the synthesis of 1,4-benzodiazepine-2,5-diones, pyrrolo[2,1-c][1,4]benzodiazepine-5,11-diones, and fused [2,1-b]quinazolinones.
Synthesis of pyrrolo[2,1-c][1,4]benzodiazepine antibiotics via azido reductive cyclization with HMDST
Kamal, Ahmed,Reddy, B.S. Praveen,Reddy, B.S. Narayan
, p. 6803 - 6806 (2007/10/03)
A new facile synthesis of pyrrolo[2,1-c][1,4]benzodiazepine (PBD) ring system has been achieved by reductive cyclization of the azide employing hexamethyldisilathiane (HMDST). The parent unsubstituted PBD and the natural product DC-81 have also been prepared in good overall yields.