la(oac)3 has been used as an efficient catalytic system for the synthesis of quinoxalines. this method provides several advantages over methods that are currently employed such as a simple work-up, mild reaction conditions, good to excellent yields, and a process to recover and reuse the catalyst for five cycles with consistent activity.

a convenient synthesis of different types of polyfunctional dihydropyrrol-2-ones via one-pot four component reactions of formaldehyde, dialkyl acetylenedicarboxylates and amines, catalyzed by trichloroacetic acid (cl3cco2h) at room temperature has been investigated. the significant advantages of this synthetic method are mild reaction conditions, available and inexpensive material, short reacti...

in this study, an efficient and green process for the synthesis of dihydropyrimidin-2(1h)-ones from aromatic benzaldehydes, ethyl acetoacetate and urea using al-mcm-41 as heterogeneous catalyst and microreactor under solvent-free conditions has been developed. the advantages of this method are easy work-up procedure, regeneration of the catalyst, clean and neutral reaction conditions.

This paper gives an overview of the design and development of an experimental restricted domain corpus-based unit selection text-tospeech (TTS) system for Hungarian. The experimental system generates weather forecasts in Hungarian. 5260 sentences were recorded creating a speech corpus containing 11 hours of continuous speech. A Hungarian speech recognizer was applied to label speech sound bound...

This paper presents a set of corpus-based text-to-speech synthesis technologies for Mandarin Chinese. A large speech corpus produced by a single speaker is used, and the speech output is synthesized from waveform units of variable lengths, with desired linguistic properties, retrieved from this corpus. Detailed methodologies were developed for designing “phonetically rich” and “prosodically ric...