Ruben Gran Tejero

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An efficient Cu(I)-catalyzed asymmetric [3 + 2] cycloaddition of N-(2-pyridylmethyl) imines has been developed. In the presence of a Cu(CH(3)CN)(4)PF(6)/bisoxazoline catalyst system, high levels of enantioselectivity (up to 97% ee) and moderate to high exo selectivity were achieved with a wide variety of substituted dipolarophiles, including maleimides,(More)
In this paper, we consider the problem of efficiently executing streaming applications on commodity processors composed of several cores and an on-chip GPU. Streaming applications, such as those in vision and video analytic, consist of a pipeline of stages and are good candidates to take advantage of this type of platforms. We also consider that(More)
Hardware data prefetch is a very well known technique for hiding memory latencies. However, in a multicore system fitted with a shared Last-Level Cache (LLC), prefetch induced by a core consumes common resources such as shared cache space and main memory bandwidth. This may degrade the performance of other cores and even the overall system performance(More)
In multitasking real-time systems, the worst-case execution time (WCET) of each task and also the effects of interferences between tasks in the worst-case scenario need to be calculated. This is especially complex in the presence of data caches. In this article, we propose a small instruction-driven data cache (256 bytes) that effectively exploits locality.(More)
General Purpose Graphics Computing Units can be effectively used for enhancing the performance of many contemporary scientific applications. However, programming GPUs using machine-specific notations like CUDA or OpenCL can be complex and time consuming. In addition, the resulting programs are typically fine-tuned for a particular target device. A promising(More)
Out of order processors use the dynamic scheduling logic both to expose and to exploit parallelism. Pipelining this logic may sacrifice the ability to execute dependent instructions in consecutive cycles. Several previous studies have shown that pipelining the scheduling logic over two cycles degrades performance; our evaluations, in a 4-way machine, on(More)
New amphiphilic block copolymers with antimicrobial properties were obtained by atom transfer radical polymerization (ATRP) and copper catalyzed cycloaddition following two approaches, a simultaneous strategy or a two-step synthesis, which were proven to be very effective methods. These copolymers were subsequently quaternized using two alkyl chains, methyl(More)
A series of six copolymeric families, P(AN-co-MTAs) with various molar fractions of acrylonitrile (fAN) and methacrylates (fMTA) based on 1,3-thiazole and 1,2,3-triazole pendant groups with several spacers of different length and nature (alkyl or succinic), have been synthesized by conventional radical polymerization. The molar fraction of acrylonitrile in(More)
A variety of cycloheptapyrane derivatives were prepared via Ni-catalyzed formal [8+3] cycloaddition of tropones with 1,1-cyclopropanediesters. The asymmetric version of the process can be achieved using either an enantiomerically enriched cyclopropane as the starting material or a racemic cyclopropane and a chiral Lewis acid.