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Hetero Diels-Alder reaction of oxadienes with 3,4-epoxy-2-methyleneoxolanes gave the corresponding 3,4-epoxy-1,6-dioxaspiro[4,5]-dec-7-enes with high stereoselectivity. Good yields of adducts were obtained in the presence of mild Lewis acis, such as zinc o ...
The cyclic undecapeptide cyclosporin A (CsA) has a remarkable spectrum of diverse biological activities, including anti-inflammatory, antifungal, antiparasitic as well as immunosuppressive activities. However, the low water solubility of this drug is a ser ...
A symposium report. Since the discovery of the immunosuppressive activity of cyclosporine A (CsA), considerable work has been devoted to the chem. synthesis of potent analogs. More recently, the finding of potential anti-HIV I activity of CsA raised intere ...
The photoelectron spectra of 3-endo-(2), of 3-exo-methoxybicyclo[2.2.1]heptan-2-one (3) and of 2-endo,3-endo-dimethoxybicyclo[2.2.1]heptane (4) are analyzed in comparison with data reported for other analogous systems and with predictions based on quantum ...
An interactive computer graphics equipment is used as an output device for representing the results of quantum chemical calculations. The advantages of such displays are illustrated by the description of several applications: (i) interactive visualization ...