Reaktionen des (Pentafluorsulfanyl)dichloramin

Abstract Selenium and tellurium form binary halides in which the chalcogen can be in formal oxidation states (IV), (II) or (I). They are versatile reagents for the preparation of a wide range of inorganic and organic selenium and tellurium compounds taking advantage of the reactivity of the chalcogen–halogen bond. With the exception of the tetrafluorides, the tetrahalides are either commercially available or readily prepared. On the other hand, the low-valent species, EX2 (E = Se, Te; X = Cl, Br) and E2X2 (E = Se, Te; X = Cl, Br) are unstable with respect to disproportionation and must be used as in situ reagents. Organoselenium and tellurium halides are well-known in oxidation states (IV) and (II), as exemplified by REX3, R2EX2 and REX (R = alkyl, aryl; E = Se, Te; X = F, Cl, Br, I); mixed-valent (IV/II) compounds of the type RTeX2TeR are also known. This chapter surveys the availability and/or preparative methods for these widely used reagents followed by examples of their applications in synthetic inorganic and organic selenium and tellurium chemistry. For both the binary halides and their organic derivatives, the discussion is subdivided according to the formal oxidation state of the chalcogen.

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“…Se2Cl2 has been utilised to generate compounds with discrete Se=N bonds by reaction with dichloramines according to eq. 16 [63,64].…”

Section: Diselenium Dihalidesmentioning

confidence: 99%

Selenium– and tellurium–halogen reagents

Chivers

Laitinen

2018

Physical Sciences Reviews

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“…Carbodiimide 247a was prepared in a similar reaction between the SF 5 -containing urea (SF 5 NH) 2 CO and PCl 5 . Imines containing an NSe bond have been prepared from 44a and either Se or Se 2 Cl 2 in high yield; also reported is the synthesis of 246 using PCl 3 . Compound 247 has also been prepared by reaction of 229 with PCl 5 .…”

Section: Chemistry Of Aliphatic Sf5 Compoundsmentioning

confidence: 99%

“…60% yield) are produced . The related bis(pentafluorosulfanyl)sulfodiimide 247b is produced by reaction of 44a with 349 . , …”

Section: Chemistry Of Aliphatic Sf5 Compoundsmentioning

confidence: 99%

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Preparation and Utility of Organic Pentafluorosulfanyl-Containing Compounds

2014

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Scheme 113. Preparation of SF 5 -Containing Arylboronic Acids and Use in Conia−Ene Cyclizations a a Reagents and conditions: (a) i-PrMgBr (1.2 equiv), B(OMe) 3 THF, −78 to 25 °C (65%); (b) 429, PhMe (3−73%). Scheme 114. Preparation of SF 5 -Containing Binaphthyl Compounds a a Reagents and conditions: (a) 428, Pd(PPh 3 ) 4 (10%), K 2 CO 3 , DMF; (b) BBr 3 (75%); (c) POCl 3 ; (d) H 2 O. Scheme 115. Asymmetric Protonation via SF 5 -Containing Acid 436 a a Reagents and conditions: (a) 436 (catalytic).

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To Give the Se—Halogen Bond

Mews¹

1989

Inorganic Reactions and Methods

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Reaktionen des (Pentafluorsulfanyl)dichloramin

Cited by 16 publications

References 16 publications

Selenium– and tellurium–halogen reagents

Selenium– and tellurium–halogen reagents

Preparation and Utility of Organic Pentafluorosulfanyl-Containing Compounds

To Give the Se—Halogen Bond

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