Disclosed is the use of the reactive components of the inverse electron-demand Diels Alder reaction for chemical masking and unmasking in vitro. This can be applied in complex chemical reactions and, particularly in the synthesis of biomolecules, e.g. on solid supports. The reactice components are a dienophile, particularly a trans-cyclooctene, and a diene, particularly a tetrazine.

The present application describes process for preparing an ortho-allylated hydroxy aryl compounds such as compounds of Formula (1) by reacting an allylic alcohol with a hydroxy aryl compound in the presence of aluminum compound selected from alumina and aluminum alkoxides and in a non-protic solvent wherein at least one carbon atom ortho to the hydroxy group in the hydroxy aryl compound is unsubstituted. The present application also includes compounds of Formula (1).

##STR00001##

The present application describes process for preparing an ortho-allylated hydroxy aryl compounds such as compounds of Formula (1) by reacting an allylic alcohol with a hydroxy aryl compound in the presence of aluminum compound selected from alumina and aluminum alkoxides and in a non-protic solvent wherein at least one carbon atom ortho to the hydroxy group in the hydroxy aryl compound is unsubstituted. The present application also includes compounds of Formula (1).

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Provided herein are novel synthetic compounds having the structure of formula (1), ##STR00001## wherein X is a substituted or unsubstituted aromatic or heteroaromatic mono- or polycyclic ring system; and Y is substituted or unsubstituted C.sup.5-C.sup.10 alkyl or alkenyl group, or a pharmaceutically acceptable salt thereof. Also provided are pharmaceutical compositions. The compounds and pharmaceutical compositions are useful for inhibiting growth of a bacterium.

The present application describes process for preparing an ortho-allylated hydroxy aryl compounds such as compounds of Formula (I) by reacting an allylic alcohol with a hydroxy aryl compound in the presence of aluminum compound selected from alumina and aluminum alkoxides and in a non-protic solvent wherein at least one carbon atom ortho to the hydroxy group in the hydroxy aryl compound is unsubstituted.

##STR00001##

The present application describes process for preparing an ortho-allylated hydroxy aryl compounds such as compounds of Formula (I) by reacting an allylic alcohol with a hydroxy aryl compound in the presence of aluminum compound selected from alumina and aluminum alkoxides and in a non-protic solvent wherein at least one carbon atom ortho to the hydroxy group in the hydroxy aryl compound is unsubstituted.

##STR00001##

Triphenylethylene compounds of formula (II) ##STR00001##
as dual aromatase inhibitors and selective estrogen receptors modulators are described. Also described are methods for treating patients of breast cancers, and patients of breast cancer comorbid with osteoporosis, using the described triphenylethylence compounds or pharmaceutical formulations thereof.

Triphenylethylene compounds as dual aromatase inhibitors and selective estrogen receptors modulators are described. Also described are methods for treating patients of breast cancers, and patients of breast cancer comorbid with osteoporosis, using the described triphenylethylence compounds or pharmaceutical formulations thereof.

Compounds and their pharmaceutically acceptable salts for treatment of tauopathies, such as Alzheimer's disease, Pick's disease, progressive supranuclear palsy, corticobasal degeneration, familial frontotemporal dementia/Parkinsonism linked to chromosome 17, amyotrophic lateral sclerosis/Parkinsonism-dementia complex, argyrophilic grain dementia, dementia pugilistic, diffuse neurofibrillary tangles with calcification, progressive subcortical gliosis and tangle only dementia.