84409-01-8Relevant articles and documents
Reaction of 4-substituted thiosemicarbazides with (2,4,7-trinitro-9H- fluoren-9-ylidene)propanedinitrile
Hassan, Alaa A.,Ibrahim, Yusria R.,Shawky, Ahmed M.,Doepp, Dietrich
, p. 849 - 854 (2006)
4-Substituted thiosemicarbazides 4a-c reacted with (2,4,7-trinitro-9H- fluoren-9-ylidene)-propanedinitrile (2) in pyridine with admission of air to form spiro[fluorene-9,3'-(1,2,4-triazole)]derivatives 5a-c and (4-substituted thiosemicarbazono)propanedinitriles 6a-c in modest yields. 2,4,7-Trinitro-9- fluorenone (8) as well as one reduction product thereof and of 2, namely compounds 9 and 10, respectively are also found. A rationale for the conversions observed is presented.
A Novel Reaction of (2,4,7-Trinito-9H-fluoren-9-ylidene)-propanedinitrile with N-Arylisoindolines
Hassan, Alaa A.,Doepp, Dietrich,Henkel, Gerald
, p. 121 - 128 (2007/10/03)
N-Arylisoindolines 1a-c reacted with (2,4,7-trinitro-9H-fluoren-9-ylidene)propanedinitrile (A) in pyridine with admission of air via a net α-H-atom abstraction and formation of [3-(2-aryl-3-arylimino-2,3-dihydro- 1H-isoindol-1-ylidene)-2-aryl-2,3-dihydro-1H-isoindol-1-ylidene] propanedinitriles 2a-c, N-[2-aryl-3-(2-aryl-3-arylimino-2,3-dihydro-1H-isoindolyl-1-idene)-2,3-dihydro- 1H-isoindol-1-ylidene]arenamines 3a,b, N,N-[2-aryl-1H-isoindole-1,3(2H)-diylidene]bisarenamines 4a,b and N-arylphthalimides 5a-c in moderate yields. 2,4,7-Trinitro-9-fluorenone as well as one reduction product each of the latter and of A, namely compounds 6 and 7, respectively, are also found. The structure of 2b has been unambiguously confirmed by an X-ray crystal structure analysis. A rationale for the conversions observed is presented. These involve dehydrogenation and oxidative couplings of 1a-c as well as transfer of N-aryl fragment from 1a-c to intermediate products.