Methyl 1-allyl-4-hy-droxy-2,2-dioxo-1H-2λ(6),1-benzo-thia-zine-3-carboxyl-ate.
There are two independent mol-ecules in the asymmetric unit of the title compound, C13H13NO5S, in both of which the ester substituent is nearly coplanar [C-C-C-O torsion angles = 2.7 (7) and -0.8 (7)°] with the planar fragment of the bicycle due to the formation of a strong O-H⋯O intra-molecular hydrogen bond. The vinyl group at the ring N atom is approximately orthogonal to the heterocyclic mean plane [C-N-C-C torsion angles = 103.1 (6) and 98.2 (5)°]. The refinement was performed on a two-component, non-merohedrally twinned crystal [population ratio = 0.483 (3):0.517 (3).
STC "Institute for Single Crystals", National Academy of Sciences of Ukraine, 60 Lenina ave., Kharkiv 61001, Ukraine.
Svitlana V
SV
Shishkina
National University of Pharmacy, 4 Blyukhera St, Kharkiv 61168, Ukraine.
Igor V
IV
Ukrainets
National University of Pharmacy, 4 Blyukhera St, Kharkiv 61168, Ukraine.
Lidiya A
LA
Petrushova