A formal total synthesis of the antitubercular natural product was accomplished. This work was undertaken to address certain stereochemical problems in our initial synthesis. By using an ester group as a surrogate for a methyl group, we were able to intercept a key intermediate in our first synthesis with better selectivity and greater convergence than had previously been the case.
We present a numerical formalism for solving the Lippmann-Schwinger equation
For the electric field in three dimensions. The formalism may be applied to
Scatterers of different shapes and embedded in different background media, and
We develop it in detail for the specific case of spherical scatterer...
We detect several emission lines ([Si VI],
Pa\alpha, Br\gamma, H_2, [Fe II]) and analyze these to disentangle the
Ionization mechanisms and the kinematics of the gas. We use the absorption
Features of Si I, CO(6-3) and CO(2-0) and the large wavelength range of
H+K-band for a thorough continuum synth...
We consider damped elastodynamic networks where the damping matrix is assumed
To be a non-negative linear combination of the stiffness and mass matrices
(also known as Rayleigh or proportional damping). We give here a
Characterization of the frequency response of such networks. We also answer the
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