5′-([1,1′-Biphenyl]-4-yl)-1′,1′′,3′′-trimethyldispiro[indane-2,2′-pyrrolidine-4′,5′′-[1,3]diazinane]-1,3,2′′,4′′,6′′-pentaone

In the title compound, C30H25N3O5, the central five-membered heterocyclic ring adopts an envelope conformation, with the N atom as the flap. The dihedral angles between this central ring and the pendant indane ring system, the trione and benzene rings are 87.49 (5), 82.95 (10) and 72.42 (10)°, respectively. The dihedral angle between the rings of the biphenyl group is 45.99 (13)°. In the crystal, molecules are linked by C—H⋯O hydrogen bonds into [101] C(12) chains.


Comment
One strategy that potentially meets the goals of synthesis and library production is multicomponent reactions (MCRs), in which three or more starting materials are brought together to build up molecular structure and complexity (Bunce et al. 2007;Duan et al. 2005;Ohno et al. 2007). The tandem reactions are significant in the context of green chemistry, as they offer convenient strategy for the rapid, elegant, and convergent construction of complex organic molecules without isolating and purifying the intermediates (Pache et al. 2003). In this context the title compound has been synthesized by using four components such as bi phenyl carboxaldehdyde, N,N-dimethyl barbituric acid, ninhydrin and sarcosine. Also its structure has been determined.

Experimental
To a suspension of biphenyl carboxaldehdyde, (1.0 mmol) in MeOH was added N,N-dimethyl barbituric acid (1.0 mmol), ninhydrin (1.0 mmol), sarcosine (1.0 mmol) and magnesium silicate catalyst (5 mol %) at room temperature. The reaction mass was stirred at 60°C for 20 minutes. Title compound was precipitated as yellow solid on standing the reaction mass.
Then it was filtered and washed with cold methanol to remove polar impurities. The compound was further recrystallized using dichloromethane: methanol: tetrahydrofuron (3:1:1) to yield colourless prisms.

Refinement
The H atoms were positioned with idealized geometry using a riding model with C-H = 0.93-0.96 Å. All H atoms were refined with isotropic displacement parameters (set to 1.2-1.5 times of the U eq of the parent atom).
Special details Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes. Refinement. Refinement of F 2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F 2 , conventional R-factors R are based on F, with F set to zero for negative F 2 . The threshold expression of F 2 > σ(F 2 ) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F 2 are statistically about twice as large as those based on F, and R-factors based on ALL data will be even larger.