A series of novel photochromic 2H-chromenes containing the ethynyl or ethoxy groups in position 4 (I, II) and an annelated pyrrole ring (III, IV) have been synthesized and their spectral and photochromic properties studied. The chromenes I - IV are characterized by high rates of thermal bleaching reaction in liquid solutions at room temperature. Longwave absorption bands of the chromenes I have their maxima at 295-308 nm, whereas their photoisomers absorb at λmax=437 nm (glassy isopentane-isopropanol, 4:1 solvent, T< 200 K). For the type chromenes III, IV the longwave absorption bands are found in the regions of λmax= 323-325 nm (ring-closed form A) and λmax= = 675-678 nm (ring-opened form B).