Terpenes and Related Compounds. XI

Some studies in the biosynthesis of terpenes and related compounds.

Cyclic terpenes as a class of natural products display a bewildering array of structural types. Well over a hundred different carbon frameworks have been detected so far, many new substances are being currently added to an already impressive list of compounds, and even several representatives of the long-sought group of sesterterpenes have at last made their appearance on the chemical scene14. ...

Coumarins, Xanthones and Related Compounds.

It has long been known that coumarins (α-pyrones) and xanthones (γ-pyrones) together form a large class of naturally occurring compounds exhibiting a wide range of biological activities. However, the interest of the scientific community for these secondary metabolites, as well as for their structural analogues, has never decreased since these “old compounds” are constantly generating promising—...

Pteroylglutamic acid and related compounds.

8ƒ¿-hydroxyflavinmononucleotide and Related Compounds

2•L,3•L,4•L-Triacetyl-FMN has been transformed by selec tive radical bromination into 2•L,3•L,4•L-triacetyl-8ƒ¿-bromo-FMN, and the following hydrolysis of the latter has afforded 8ƒ¿-hydroxy-FMN. The presence of the hydroxy group in the 8ƒ¿ position of 8ƒ¿-hydroxy FMN is confirmed by its acetylation into 2•L,3•L-dracetyl-8ƒ¿-acetoxyribofla vin-4•L,5•L-cyclophosphate. The absorption spectra of t...

Corrigendum: ER network dynamics are differentially controlled by myosins XI-K, XI-C, XI-E, XI-I, XI-1, and XI-2

The endoplasmic reticulum (ER) of higher plants is a complex network of tubules and cisternae. Some of the tubules and cisternae are relatively persistent, while others are dynamically moving and remodeling through growth and shrinkage, cycles of tubule elongation and retraction, and cisternal expansion and diminution. Previous work showed that transient expression in tobacco leaves of the moto...