ChemInform Abstract: Synthesis of Primary and Secondary Phosphines by Selective Alkylation of PH3 Under Phase Transfer Conditions.

ChemInform ◽  
1990 ◽  
Vol 21 (22) ◽  
Author(s):  
K. P. LANGHANS ◽  
O. STELZER ◽  
J. SVARA ◽  
N. WEFERLING
Keyword(s):  
Phase Transfer ◽  
Selective Alkylation ◽  
Secondary Phosphines

Synthese primärer und sekundärer Phosphane durch selektive Alkylierung von PH3 unter Phasentransferbedingungen / Synthesis of Primary and Secondary Phosphines by Selective Alkylation of PH3 under Phase Transfer Conditions

1990 ◽  
Vol 45 (2) ◽  
pp. 203-211 ◽  
Author(s):  
Klaus P. Langhans ◽  
Othmar Stelzer ◽  
Jürgen Svara ◽  
Norbert Weferling
Keyword(s):  
Phase Transfer ◽  
Alkyl Halides ◽  
Cyclization Reaction ◽  
High Yield ◽  
Two Phase ◽  
Phase Transfer Catalysts ◽  
Phase Systems ◽  
Selective Alkylation ◽  
Secondary Phosphines

Primary phosphines, RPH2, may be synthesized selectively by alkylation of phosphine, PH3, with alkyl halides RX (R = Me, Et, n-Bu, 2-Bu, C16H33, CH2=CH–CH2, Ph–CH2, 2-Py–CH2–CH2; X = Cl, Br) and concentrated aqueous KOH as auxilliary base in dimethylsulfoxide as a solvent or in two phase systems employing phase transfer catalysts. Under more rigorous conditions secondary phosphines R2PH (R = Me, n-Bu, CH2=CH–CH2) are also accessible in good yields. Using 1,3-dibromo(chloro)-propane or -butane diprimary phosphines H2P–(CH2)2–CHR–PH2 (R = H, Me) are obtained, while 1,4-dibromopentane in a high yield cyclization reaction leads to 2-methylphospholane (12) with a chiral C-atom in a-position.

ChemInform Abstract: Selective Alkylation of Pyrrole by Phase Transfer Catalysis in the Absence of Solvent.

ChemInform ◽  
2010 ◽  
Vol 26 (22) ◽  
pp. no-no
Author(s):  
E. DIEZ-BARRA ◽  
A. DE LA HOZ ◽  
A. LOUPY ◽  
A. SANCHEZ-MIGALLON
Keyword(s):  
Phase Transfer Catalysis ◽  
Phase Transfer ◽  
Selective Alkylation

ChemInform Abstract: Selective Alkylation of Protected Peptide Derivatives by Phase- Transfer Catalysis.

ChemInform ◽  
1995 ◽  
Vol 26 (16) ◽  
pp. no-no
Author(s):  
M. J. O'DONNELL ◽  
T. P. BURKHOLDER ◽  
V. V. KHAU ◽  
R. W. ROESKE ◽  
Z. TIAN
Keyword(s):  
Phase Transfer Catalysis ◽  
Phase Transfer ◽  
Peptide Derivatives ◽  
Selective Alkylation

Selective alkylation of pyrrole by phase transfer catalysis in the absence of solvent

1994 ◽  
Vol 31 (6) ◽  
pp. 1715-1717 ◽  
Author(s):  
E. Díez-Barra ◽  
A. De La Hoz ◽  
A. Sánchez-Migallón ◽  
A. Loupy
Keyword(s):  
Phase Transfer Catalysis ◽  
Phase Transfer ◽  
Selective Alkylation

Shape-Selective Alkylation of Toluene with Methanol over Modified Nano-scale HZSM-5 Zeolite

2014 ◽  
Vol 32 (7) ◽  
pp. 1280-1286 ◽  
Author(s):  
Zhiping ZHANG ◽  
Yan ZHAO ◽  
Hongyu WU ◽  
Wei TAN ◽  
Xiangsheng WANG ◽  
...  
Keyword(s):  
Nano Scale ◽  
Shape Selective ◽  
Selective Alkylation
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