Abstract: Systems and methods for controlling environmental conditions in a building are described herein. The system determines real-time locations of one or more user devices. When an occupant of the building uses a user device to send a request to change an environmental condition, the system identifies a control zone that corresponds to a current location of the user device and determines a system setting for the subsystem that is associated with the requested change. The determined system setting is communicated to the subsystem to implement the change in the environmental condition at the control zone in response to the requested change.

Abstract: A three-step process is provided for preparing the L,D and DL isomers of N[p-{[(2,4-diamino-6-pteridyl)-methyl]N.sup.10 -methylamino}-benzoyl]-glutamic acid. The first step produces: 2,4-diamino-6-hydroxymethyl pteridine by condensation in a buffered aqueous media of 2,3,4,5-tetraminopyrimidine dihydrochloride with the bisulphite addition product of 1,3-dihydroxyacetone in the presence of cysteine as catalyst and using selenium dioxide and a continuous air bubbling as oxidation agents. In the next step, 2,4-diamino-6-halomethylpteridine is obtained by halogenation of the previously obtained 2,4-diamino-6-hydroxymethylpteridine in an inert media with a halogenation agent such as thionyl chloride, in the presence of a basic catalyst such as pyridine or triethylamine. In the third step, N[p-{[(2,4-diamino-6-pteridyl)-methyl]-N.sup.