The synthesis of pyrroles via acceptorless dehydrogenative condensation of secondary alcohols and 1,2-amino alcohols mediated by a robust and reusable catalyst based on nanometer-sized iridium particles

2014 ◽  
Vol 4 (12) ◽  
pp. 4188-4192 ◽  
Author(s):  
Daniel Forberg ◽  
Johannes Obenauf ◽  
Martin Friedrich ◽  
Sven-Martin Hühne ◽  
Werner Mader ◽  
...  
Keyword(s):  
Amino Alcohols ◽  
Reusable Catalyst ◽  
Secondary Alcohols

Nickel-Catalyzed Double Dehydrogenative Coupling of Secondary Alcohols and β-Amino Alcohols To Access Substituted Pyrroles

2019 ◽  
Vol 84 (21) ◽  
pp. 13557-13564 ◽  
Author(s):  
Anitha Alanthadka ◽  
Sourajit Bera ◽  
Mari Vellakkaran ◽  
Debasis Banerjee
Keyword(s):  
Amino Alcohols ◽  
Secondary Alcohols ◽  
Dehydrogenative Coupling ◽  
Substituted Pyrroles

H3PW12O40 — A selective, environmentally benign, and reusable catalyst for the preparation of methoxymethyl and ethoxymethyl ethers and their deprotections under mild conditions

2008 ◽  
Vol 86 (8) ◽  
pp. 831-840 ◽  
Author(s):  
Iraj Mohammadpoor-Baltork ◽  
Majid Moghadam ◽  
Shahram Tangestaninejad ◽  
Valiollah Mirkhani ◽  
Arsalan Mirjafari
Keyword(s):  
Reaction Times ◽  
Environmentally Benign ◽  
Reusable Catalyst ◽  
Secondary Alcohols ◽  
Selective Protection ◽  
Trimethylsilyl Ethers ◽  
Solvent Free Conditions ◽  
Benzyl Ethers ◽  
High Yields ◽  
Work Up

Different types of primary and secondary alcohols were efficiently transformed to their corresponding methoxymethyl (MOM) and ethoxymethyl (EOM) ethers in the presence of catalytic amounts of H3PW12O40 at room temperature under solvent-free conditions. Selective protection of primary and secondary alcohols in the presence of phenols and tertiary alcohols was achieved by this method. Deprotection of these ethers to their parent alcohols was also performed using this catalyst in ethanol under reflux conditions. We have also found that primary and secondary MOM- and EOM-ethers are selectively deprotected in the presence of phenolic and tertiary ones, methyl and benzyl ethers, esters, and trimethylsilyl ethers by this catalyst. The notable advantages of this protocol are high yields, short reaction times, easy work-up, non-toxicity, easy availability and handling, eco-friendly, and reusability of the catalyst.Key words: methoxymethylation, ethoxymethylation, protection, deprotection, heteropoly acid.

scholarly journals Synthesis of 2,5-disubstituted pyrroles via dehydrogenative condensation of secondary alcohols and 1,2-amino alcohols by supported platinum catalysts

2016 ◽  
Vol 3 (7) ◽  
pp. 846-851 ◽  
Author(s):  
S. M. A. H. Siddiki ◽  
Abeda S. Touchy ◽  
Chandan Chaudhari ◽  
Kenichi Kon ◽  
Takashi Toyao ◽  
...  
Keyword(s):  
Platinum Catalysts ◽  
Amino Alcohols ◽  
Secondary Alcohols ◽  
Carbon Catalyst ◽  
Supported Platinum ◽  
Supported Platinum Catalysts

2,5-Disubstituted pyrroles are synthesized by acceptorless dehydrogenative reaction of 1,2-aminoalcohols and secondary alcohols by Pt/carbon catalyst.

ChemInform Abstract: Nanocrystalline TiO2as an Efficient and Reusable Catalyst for the Chemoselective Trimethylsilylation of Primary and Secondary Alcohols and Phenols.

ChemInform ◽  
2011 ◽  
Vol 43 (4) ◽  
pp. no-no
Author(s):  
Farhad Shirini ◽  
Meysam Alipour Khoshdel ◽  
Masoumeh Abedini ◽  
Seyyed Vahid Atghia
Keyword(s):  
Reusable Catalyst ◽  
Secondary Alcohols

Enantioselective addition of ArTi(OiPr)3 to aldehydes catalyzed by a titanium complex of an N-sulfonylated amino alcohol

RSC Advances ◽  
2015 ◽  
Vol 5 (13) ◽  
pp. 9368-9373 ◽  
Author(s):  
Shih-Ju Chang ◽  
Shuangliu Zhou ◽  
Han-Mou Gau
Keyword(s):  
Amino Alcohol ◽  
Amino Alcohols ◽  
Secondary Alcohols ◽  
Titanium Catalyst ◽  
Titanium Complex ◽  
Enantioselective Addition ◽  
Asymmetric Additions

Asymmetric additions of ArTi(OiPr)3 to aldehydes catalyzed by a titanium catalyst of N-sulfonylated amino alcohols to afford desired secondary alcohols in good yields with good to excellent enantioselectivities of up to 95% ee.

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