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author can archive pre-print (ie pre-refereeing). 12 meses de embargo Conference paper DOI: 10.1515/pac-2014-0934 URL: https://www.degruyter.com/view/j/pac.2015.87.issue-2/pac-2014-0934/pac-2014-0934.xml Filiació URV: SI Diboron reagents can be activated both, from a metal or free-metal context, and consequently the addition of boryl units to unsaturated substrates proceeds sometimes with complementary selectivity. We highlight here the power of boron chemistry to functionalize molecules and provide new routes towards challenging compounds

author can archive pre-print (ie pre-refereeing). 12 meses de embargo Conference paper DOI: 10.1515/pac-2014-0934 URL: https://www.degruyter.com/view/j/pac.2015.87.issue-2/pac-2014-0934/pac-2014-0934.xml Filiació URV: SI Diboron reagents can be activated both, from a metal or free-metal context, and consequently the addition of boryl units to unsaturated substrates proceeds sometimes with complementary selectivity. We highlight here the power of boron chemistry to functionalize molecules and provide new routes towards challenging compounds

author can archive pre-print (ie pre-refereeing) 12 meses de embargo DOI: 10.1039/c4ob02478h URL: http://pubs.rsc.org/en/Content/ArticleLanding/2015/OB/C4OB02478H#!divAbstract Filiació URV: SI The adduct [MeO ¿ Bpin-Bpin]- efficiently mediates the ¿-boration of ¿,¿-unsaturated imines formed in situ. The use of chiral phosphines as additives, and in particular the chiral phosphine (S)-MeBoPhoz, enables the catalytic asymmetric reaction to proceed with higher enantioselectivity than the analogue copper(i) mediated reaction.

author can archive pre-print (ie pre-refereeing). 12 meses de embargo DOI: 10.1039/c4cc02098g URL: http://pubs.rsc.org/en/Content/ArticleLanding/2014/CC/c4cc02098g#!divAbstract Filiació URV: SI Activated olefins directly react with phenylselenium boranes, at room temperature, without the need of metal or organocatalytic assistance. A simple mechanism that involves the interaction of the electron pair of carbonyl functional group in ¿,¿-unsaturated ketones and aldehydes, with the empty p orbital of the boron atom, justifies the efficient reaction towards the kinetically and thermodynamically most stable 1,4-addition product. Up to 12 examples of ¿ (phenylseleno) substituted ketones and aldehydes have been prepared with moderate to high yield. The simplicity and efficiency of this new reactivity generates new strategic platforms towards the C-Se bond formation and opens non existing pathways to create C-heteroatom bonds, as a general tool

author can archive pre-print (ie pre-refereeing) DOI: 10.1002/adsc.201500650 URL: http://onlinelibrary.wiley.com/doi/10.1002/adsc.201500650/abstract;jsessionid=BDAFCF7CB20C8EAEB9EE626EFD8A7F6C.f04t01 Filiació URV: SI The ¿pull push¿ effect of the Bpin moiety in ArE-Bpin reagents (E=Se, S) is demonstrated by the Lewis acid interaction with the carbonyl group of ynones and the concomitant delivery of ArSe or ArS to the electron deficient alkyne with impressive stereoselectivity. The two component reactivity is carried out in MeOH to generate (Z)-¿-(arylseleno)-¿,¿-unsaturated ketones and (Z)-¿-(arylsulfuro)-¿,¿-unsaturated ketones with a consensus between experimental and theoretical understanding of the mechanism

author can archive pre-print (ie pre-refereeing) DOI: 10.1002/adsc.201500650 URL: http://onlinelibrary.wiley.com/doi/10.1002/adsc.201500650/abstract;jsessionid=BDAFCF7CB20C8EAEB9EE626EFD8A7F6C.f04t01 Filiació URV: SI The ¿pull push¿ effect of the Bpin moiety in ArE-Bpin reagents (E=Se, S) is demonstrated by the Lewis acid interaction with the carbonyl group of ynones and the concomitant delivery of ArSe or ArS to the electron deficient alkyne with impressive stereoselectivity. The two component reactivity is carried out in MeOH to generate (Z)-¿-(arylseleno)-¿,¿-unsaturated ketones and (Z)-¿-(arylsulfuro)-¿,¿-unsaturated ketones with a consensus between experimental and theoretical understanding of the mechanism

author can archive pre-print (ie pre-refereeing). 12 meses de embargo DOI: 10.1039/c4cc02098g URL: http://pubs.rsc.org/en/Content/ArticleLanding/2014/CC/c4cc02098g#!divAbstract Filiació URV: SI Activated olefins directly react with phenylselenium boranes, at room temperature, without the need of metal or organocatalytic assistance. A simple mechanism that involves the interaction of the electron pair of carbonyl functional group in ¿,¿-unsaturated ketones and aldehydes, with the empty p orbital of the boron atom, justifies the efficient reaction towards the kinetically and thermodynamically most stable 1,4-addition product. Up to 12 examples of ¿ (phenylseleno) substituted ketones and aldehydes have been prepared with moderate to high yield. The simplicity and efficiency of this new reactivity generates new strategic platforms towards the C-Se bond formation and opens non existing pathways to create C-heteroatom bonds, as a general tool