α‐Aryliodonio‐Diazoverbindungen: S_N‐Reaktionen am α‐C‐Atom als neuartiger Reaktionstyp von Diazoverbindungen

Abstract

ZUSCHRIFTEN 0.60 x 0.50 x 0.35 n1m3. 9933 Reflexe wurdcn auf einein Enraf-Nonius-CAD4-Diffraktometer bci -96°C gcsammelt (Mo,-Strahlnng. 0" < 0 23"). Strukturlosung mit Direkten Methoden. alle Nicht-Wasserstoffatome wurden nach dem Kleinste-Fchlcrqnadrate-Verfahren (Vollmatrix) anisotrop verfeinert. 5997 iinabhangige. heobachtete Reflexe [ ( I ) > 2.00(l)], R = 0.053 und R, = 0.046, GOF = 1.285. Weitere Einzelheiten zur Kristallstruktnrunlersuchung konnen beim Direktor des Cambndge Crystallographic Data Centre, University Chemical Laboratory. 12 Union Road, GB-Cambridge CB2 1EZ, unter Anga be des vollstindigen Literaturzitats angefordert werden.

β‐Diazocarbonyl Compounds: Synthesis and their Rh(II)‐Catalyzed 1,3 C−H Insertions

“…[9,10] In 1994, the group of Weiss reported the synthesis of the parent linear hypervalent iodine derivate and demonstrated its ability to react with nucleophiles such as sulfides,p hosphines or amines. [11] More recently,t he groups of Bonge-Hansen [12] and Gaunt [13] demonstrated applications of the linear hypervalent iodine reagents in nucleophilic halogenations and in am ethionine bioconjugation of peptides and proteins,respectively. [14] Considering that this unusual class of hypervalent iodine reagents can serve as an electrophilic diazomethyl source,we anticipated that silyl enol ethers derived from ketones could be suitable nucleophiles.Infact, silyl enol ethers are known to react with hypervalent iodine reagents and deliver a-substituted carbonyl compounds.…”