نتایج جستجو برای: benzopyran
تعداد نتایج: 614 فیلتر نتایج به سال:
In the title compound, C(18)H(16)O(6), the dimethoxy-phenyl ring is rotated by 61.8 (1)° from the plane of the benzopyran system. The mol-ecule is stabilized by an intra-molecular O-H⋯O hydrogen bond.
Brewer (1958) described the isolation ofa number of fungi from slime samples taken from pulp and paper mills in Eastern Canada, one of the organisms being identified as Truncatella ramulosa (v. Beyma) Steyaert (Syn. Pestalotia ramulosa v. Beyma). In 1959, during a study of a subculture of this organism, we observed crystals in old cultures grown on malt-extract-agar. In a preliminary note Benja...
The title compound, C(18)H(16)O(4), is composed of a benzopyran-one core with a 4-methoxy-phenyl subsituent in the 3-position and an additional eth-oxy group in the 7-position. The benzopyran-one ring is not coplanar with the benzene ring, the dihedral angle between them being 41.76 (7)°. The meth-oxy and eth-oxy substituents are nearly coplanar with the ring systems to which they are attached....
Inhibition of epidermal growth factor receptor (EGFR) signaling is considered to be a promising treatment strategy for estrogen receptor (ER)-negative breast tumors. We have investigated here the anti-breast cancer properties of a novel anti-proliferative benzopyran compound namely, 2-[piperidinoethoxyphenyl]-3-phenyl-2H-benzo(b)pyran (CDRI-85/287) in ER- negative and EGFR- overexpressing breas...
An efficient and concise total synthesis of naturally occurring pyranochalcones was achieved from readily available 2,4-dihydroxyacetophenone and 2,4-dihydroxy-6-methoxyacetophenone. The key steps in the synthetic strategy were ethylenediamine diacetate-catalyzed benzopyran formation and aldol reactions.
Methyl 3-(4-fluorophenyl)-1-methyl-1,2,3,3a,4,9b-hexahydrochromeno[4,3-b]pyrrole-3a-carboxylate
In the title compound, C(20)H(20)FNO(3), the pyrrolidine and benzopyran rings adopt half chair and twisted half chair conformations, respectively. The carboxyl-ate group is almost perpendicular to the pyran ring [89.4 (1)°].
a series of 2-amino-4-(nitroalkyl)-4h-chromene-3-carbonitriles were synthesized by an efficient multicomponent reaction in aqueous media using dbu (1,8-diazabicyclo[5.4.0]undec-7-ene) as a catalyst at room temperature. mild condition, environment friendly procedure and excellent yields are the main advantages of this procedure. the cytotoxic activity of target compounds were evaluated against t...
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