ChemInform Abstract: KORRELATION ZWISCHEN MASSENSPEKTREN UND MOLEKULARSTRUKTUR DER ORGANOSILICIUMVERBINDUNGEN MIT ZWEI SI‐ATOMEN (I) UND (II)

Tamás, J.; Újszászy, Kálmán; Szèkely, T.; Bujtás, Gy.

doi:10.1002/chin.197014021

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2004

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“…Different from what was observed for the six‐membered ring derivatives 1 – 4 , the mass spectra of 11 – 14 show the loss of a CH 3 radical to give the ions at m/z 330 ( 11 , 13 ) and 393 ( 12 , 14 ) – cf. Scheme 57. In conformity with the 1,3,4,2‐oxadiazaphosphinane 2‐oxides, ionization occurs on the aromatic ring, giving rise to the primary ions [M–CH 3 ] + and for compound 11a , b additionally to the ion [M–CH 3 O] + at m/z 314 (cf.…”

Section: Resultsmentioning

confidence: 94%

Molecular Evolution Using Intramolecular Acyl Migration on myo‐Inositol Benzoates with Thermodynamic and Kinetic Selectors

Ahn

Chang

2004

Chemistry A European J

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A molecular evolution model was successfully demonstrated by combining the intramolecular acyl migration on inositol tribenzoates and boron selectors. The addition of boric acid to 12 members of DCL (dynamic combinatorial library) induced the dramatic amplification of myo-I(2,4,6)Bz(3) (1) with up to 94 % under thermodynamic (see Figure 1 c) control while a portion of phenyl boronic acid caused two significant different distributions: under kinetic control, the pre-equilibrium of DCL shifted to induce the exclusive amplification of 1,4,6-tribenzoyl myo-inositol (7) with decrease of other members up to 82 % from the mixture (see Figure 2 b), and changed gradually to form 2,4,6-tribenzoyl myo-inositol (1) with up to 96 % under thermodynamic control (Figure 2 c).

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Section: Resultsmentioning

confidence: 94%