[formula: see text] Compounds that induce the synthesis of nerve growth factor (NGF) are of interest as alternatives to the administration of the native peptide. We have initiated a program to study the NGF synthesis stimulating activity of the erinacine and scabronine diterpenes. Herein, we report an approach to the core cyathin system by sequential application of an oxidative coupling and [4 + 3] cycloaddition.
[reaction: see text] A two-step electrochemical annulation has been developed for the preparation of fused furans. The process involves an initial conjugate addition of a furyethyl cuprate and trapping of the enolate as the corresponding silyl enolether. The second step of the annulation involves the anodic coupling of the furan and the silyl enol ether to form a six-membered ring.
N- [R-Amino(hetero)arylmethyl]benzotriazoles derived from a variety of (hetero)aromatic aldehydes were reacted with sodium phenolates to afford amino(hetero)arylmethylated phenols in high yields.
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