<b>Some Aspects of the Chemistry of Cyclopolyphosphines</b>

Henderson, W. A.; Epstein, Martin; Seichter, Francis S.

doi:10.1021/ja00899a027

Cited by 113 publications

(62 citation statements)

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“…The 31 P-NMR signals for the four equivalent phosphorus atoms appeared in the expected region (d ‫ס‬ ‫)6.41מ‬ for cyclophosphanes [9][10][11][12]. The 31 P-NMR signals for the four equivalent phosphorus atoms appeared in the expected region (d ‫ס‬ ‫)6.41מ‬ for cyclophosphanes [9][10][11][12].…”

Section: Hydrostannylation Of Phosphaalkene 11 With Triorganotin Hydrmentioning

confidence: 99%

Hydrostannylation of phosphaalkenes [1]

Schmitz¹,

Leininger²,

Bergsträßer³

et al. 1998

Heteroatom Chem.

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Hydrostannylation reactions of the phosphaalkenes 9,11, and 21 with the triorganotin hydrides 1 proceed by different routes. Whereas the trior‐ganotin hydrides 1a,b undergo regioselective 1,2‐addition to the P/C double bond of the P‐aminophosphaalkene 9 to furnish the 2‐stannylphosphanes 17a,b, the 1,2‐addition products to the P‐halophosphaalkenes 11 and 21 can only be postulated as the reactive intermediates 20 and 23, respectively. The reactions of 11 with 1a,b proceed with cleavage of the triorganotin halide via the diphosphene 15 to furnish the cyclophosphanes 18 and 19. On the other hand, the hydrostannylation reactions of the phosphaalkene 21 are not selective, and the 1,3‐diphosphetane 22 is isolated as one of the reaction products. © 1998 John Wiley & Sons, Inc. Heteroatom Chem 9:453–460, 1998

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Section: Hydrostannylation Of Phosphaalkene 11 With Triorganotin Hydrmentioning

confidence: 99%

Hydrostannylation of phosphaalkenes [1]

Schmitz¹,

Leininger²,

Bergsträßer³

et al. 1998

Heteroatom Chem.

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“…Surprisingly, contrary to [42], when diethyl ether instead of THF had been used as a solvent, no product 8 was obtained. The parent peak (m/z 540) in mass spectrum of 8 clearly indicates the five-membered ring [42,45,47]. The reaction of (PhP) 5 with metallic selenium affords compound 9 (89% yield) [48][49][50].…”

Section: Resultsmentioning

confidence: 84%

“…The reagent is able to selenate amides and formamides by substitution of the oxygen atom [40,41]. The condensation of dichlorphenylphosphine (7) with magnesium in THF [42][43][44][45][46] yields pentaphenylpentaphospholane [(PhP) 5 , (8)] SCHEME 1 (i) HCOOEt [38] (ii) COCl 2 [38] or ClCOOCCl 3 (diphosgene) (iii) Se, CHCl 3 [39] (iv) (5a-h) HX, benzene (6a,b) HX/NaX. (62% yield).…”

Section: Resultsmentioning

confidence: 99%

Reactions of nitroxides, part 7: Synthesis of novel nitroxide selenoureas

Zakrzewski

Krawczyk

2008

Heteroatom Chemistry

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“…)3 [2], zu. Im Fall des Cyclotetraphosphans (PB u% [3] sowie der Cyclopentaphosphane (PM e)5 [4] und (P E t)5 [5] ergaben nähere Untersuchungen [6,7], daß die Reaktion mit trockenem Luftsauerstoff im U nter schuß bei R aum tem peratur zu den entsprechenden Cyclophosphan-monoxiden (PBu')40 bzw. (PR )sO (R = Me, Et) führt.…”

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Beiträge zur Chemie des Phosphors, 242 Tri-tert-butylcyclotriphosphan-monoxid, (PBu^t )₃O - Bildung und ₃₁P-NMR-spektroskopische Strukturbestimmung/ Contributions to the Chemistry of Phosphorus, 242 Tri-tert-butylcyclotriphosphane Monoxide, (PBu^tO — Formation and Structure Determination by ³¹P NMR Spectroscopy

Baudler

Breitkopf

1999

Zeitschrift Für Naturforschung B

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Tri-/eAt-butylcyclotriphosphane Monoxide, 1,2,3-Tri-terr-butyl-l-oxocyclotriphosphane, Tetrarm-butylcyclotetraphosphane Monoxide, Tetra-/m-butylcyclotetraphosphane Dioxide, 1,2,3,4-Tetra-te/-f-butyl-l,2-dioxocyclotetraphosphaneThe partially oxidized cyclotriphosphane (PB u')30 (1,2,3-tri-rm-butyl-l-oxocyclotriphosphane) (1) has been obtained by [2 + 1] cyclocondensation of K (B u')P -P (B u')K with Bu'P(0)C12 in toluene at -7 8 °C. The cyclophosphanes (PBu% and (PBuf)3 as well as small amounts of the open-chain triphosphane [B u'P(0)C l]2P (0 )B u ' are also formed. In contrast to the unoxidized com pound (PBu')3, compound 1 is not stable at room tem perature, but decomposes above -3 0 °C undergoing rearrangement into the cyclotetraphosphanes (P B u % 0 (2), (PBur)402 (3), and (PBu')4. The 31P NMR parameters of 1 and 3 are reported and discussed.

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Some Aspects of the Chemistry of Cyclopolyphosphines

Cited by 113 publications

References 0 publications

Hydrostannylation of phosphaalkenes [1]

Hydrostannylation of phosphaalkenes [1]

Reactions of nitroxides, part 7: Synthesis of novel nitroxide selenoureas

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