Acta Phys. -Chim. Sin. ›› 1986, Vol. 2 ›› Issue (06): 484-492.doi: 10.3866/PKU.WHXB19860602

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THE STRUCTURES OF 1,3-DIMETHYL-6-AZATHYMINE AND ITS PHOTOCYCLOADDUCTS OF CH2CH-Z(Z=CN, COCH3) AND PHOTOCYLOADDITION MECHANISM

Wang Honghui; Zhu Naijue; Fu Heng; Fan Meigong; Liu Xiaoyun   

  1. nstitute of Chemistry, Academia Sinica, Beijing; Institute of Photographic Chemistry, Beijing
  • Received:1985-03-06 Revised:1985-06-25 Published:1986-12-15

Abstract: The crystal structure of 1,3—dimethyl-6-azathymine and its four photocycloadducts of CH_2CH-Z(Z=CN, COCH_3) were determined by X-Ray diffraction. The main crystallographic data are listed in Tabie 1. The absolute configurations of the compounds(Ⅱ) and (Ⅳ) were not determined.
The molecular structure of 1,3-dimethy-6-azathymine is shown in Fig.1. Its six-membered ring is roughly planar. The C-N single bond lengths which are nearly equivalent in the six-membered ring are shorter than that in the photocycloadducts (see ...