Chemoselective conjugation is achieved through redox reactivity by reacting an N-transfer oxidant with a thioether substrate in a redox reaction in an aqueous environment to form a conjugation product. In embodiments, Redox-Activated Chemical Tagging (ReACT) strategies for methionine-based protein functionalization. Oxaziridine (Ox) compounds serve as oxidant-mediated reagents for direct functionalization by converting methionine to the corresponding sulfimide conjugation product.

Provided are methods of preparing 3-R-1,4,2-dioxazol-5-one compounds using convenient and efficient methods. Also provided are 3-R-1,4,2-dioxazol-5-one compounds produced using the methods described.

Provided are methods of preparing 3-R-1,4,2-dioxazol-5-one compounds using convenient and efficient methods. Also provided are 3-R-1,4,2-dioxazol-5-one compounds produced using the methods described.

The present disclosure relates to novel, safe and efficient processes for the synthesis of Pimavanserin and salts thereof, as well as novel intermediates that can be used in these processes. ##STR00001##

The present disclosure relates to novel, safe and efficient processes for the synthesis of Pimavanserin and salts thereof, as well as novel intermediates that can be used in these processes. ##STR00001##

The present invention provides a novel compound having an antiviral activity, in particular, an HIV replication inhibiting activity, as well as a pharmaceutical composition, in particular, an anti-HIV agent.

##STR00001##

wherein ring A is substituted or unsubstituted carbocycle or substituted or unsubstituted heterocycle; R.sup.1 is substituted or unsubstituted alkyl etc.; R.sup.2 is substituted or unsubstituted alkyloxy etc.; n is 1 or 2; R.sup.3 is substituted or unsubstituted carbocyclyl or substituted or unsubstituted heterocyclyl; R.sup.4 is a hydrogen atom etc.; R.sup.6 is substituted or unsubstituted alkyl etc.

The present invention provides a novel compound having an antiviral activity, in particular, an HIV replication inhibiting activity, as well as a pharmaceutical composition, in particular, an anti-HIV agent.

##STR00001##

wherein ring A is substituted or unsubstituted carbocycle or substituted or unsubstituted heterocycle; R.sup.1 is substituted or unsubstituted alkyl etc.; R.sup.2 is substituted or unsubstituted alkyloxy etc.; n is 1 or 2; R.sup.3 is substituted or unsubstituted carbocyclyl or substituted or unsubstituted heterocyclyl; R.sup.4 is a hydrogen atom etc.; R.sup.6 is substituted or unsubstituted alkyl etc.

Provided are methods of preparing 3-R-1,4,2-dioxazol-5-one compounds using convenient and efficient methods. Also provided are 3-R-1,4,2-dioxazol-5-one compounds produced using the methods described.

Provided are methods of preparing 3-R-1,4,2-dioxazol-5-one compounds using convenient and efficient methods. Also provided are 3-R-1,4,2-dioxazol-5-one compounds produced using the methods described.

Synthesis of a compound (2E)-4-[(4-chlorophenyl)amino]-N-phenyl-2-(phenylimino)-1,3,5-dioxazepine-7-carboxamide and its use as an insecticidal agent.