Catalytic ring-opening allylation of cyclic acetals with allylsilanes using silica-alumina

2010 ◽  
Vol 12 (8) ◽  
pp. 1373 ◽  
Author(s):  
Ken Motokura ◽  
Hirokazu Yoneda ◽  
Akimitsu Miyaji ◽  
Toshihide Baba
Keyword(s):  
Ring Opening ◽  
Cyclic Acetals ◽  
Silica Alumina

ChemInform Abstract: Catalytic Ring-Opening Allylation of Cyclic Acetals with Allylsilanes Using Silica-Alumina.

ChemInform ◽  
2010 ◽  
Vol 42 (1) ◽  
pp. no-no
Author(s):  
Ken Motokura ◽  
Hirokazu Yoneda ◽  
Akimitsu Miyaji ◽  
Toshihide Baba
Keyword(s):  
Ring Opening ◽  
Cyclic Acetals ◽  
Silica Alumina

Ring Opening of Biomass-Derived Cyclic Ethers to Dienes over Silica/Alumina

ACS Catalysis ◽  
2017 ◽  
Vol 7 (8) ◽  
pp. 5248-5256 ◽  
Author(s):  
Mrunmayi D. Kumbhalkar ◽  
J. Scott Buchanan ◽  
George W. Huber ◽  
James A. Dumesic
Keyword(s):  
Ring Opening ◽  
Cyclic Ethers ◽  
Silica Alumina

Ring-Opening Reactions of Cyclic Acetals and 1,3-Oxazolidines with Halosilane Equivalents

2002 ◽  
Vol 67 (15) ◽  
pp. 5170-5175 ◽  
Author(s):  
Arihiro Iwata ◽  
Heqing Tang ◽  
Atsutaka Kunai ◽  
Joji Ohshita ◽  
Yasushi Yamamoto ◽  
...  
Keyword(s):  
Ring Opening ◽  
Cyclic Acetals ◽  
Ring Opening Reactions

Catalytic synthesis of homoallyloxyalcohols and 1,2-bis(homoallyloxy)ethanes through ring-opening allylation of cyclic acetals with allylsilanes over solid acids

2011 ◽  
Vol 1 (3) ◽  
pp. 470 ◽  
Author(s):  
Ken Motokura ◽  
Hirokazu Yoneda ◽  
Akimitsu Miyaji ◽  
Yasuharu Sakamoto ◽  
Toshihide Baba
Keyword(s):  
Ring Opening ◽  
Solid Acids ◽  
Catalytic Synthesis ◽  
Cyclic Acetals

Chemically recyclable thermoplastics from reversible-deactivation polymerization of cyclic acetals

Science ◽  
2021 ◽  
Vol 373 (6556) ◽  
pp. 783-789
Author(s):  
Brooks A. Abel ◽  
Rachel L. Snyder ◽  
Geoffrey W. Coates
Keyword(s):  
Ring Opening ◽  
Strong Acid ◽  
Chemical Recycling ◽  
Acid Catalysts ◽  
Cyclic Acetals ◽  
Molecular Weights ◽  
Reversible Deactivation ◽  
Waste Mixture ◽  
Cationic Ring Opening Polymerization ◽  
Polymerization Method

Identifying plastics capable of chemical recycling to monomer (CRM) is the foremost challenge in creating a sustainable circular plastic economy. Polyacetals are promising candidates for CRM but lack useful tensile strengths owing to the low molecular weights produced using current uncontrolled cationic ring-opening polymerization (CROP) methods. Here, we present reversible-deactivation CROP of cyclic acetals using a commercial halomethyl ether initiator and an indium(III) bromide catalyst. Using this method, we synthesize poly(1,3-dioxolane) (PDXL), which demonstrates tensile strength comparable to some commodity polyolefins. Depolymerization of PDXL using strong acid catalysts returns monomer in near-quantitative yield and even proceeds from a commodity plastic waste mixture. Our efficient polymerization method affords a tough thermoplastic that can undergo selective depolymerization to monomer.

Controlled cationic copolymerization of vinyl monomers and cyclic acetals via concurrent vinyl-addition and ring-opening mechanisms: the systematic study of structural effects on the copolymerization behavior

2019 ◽  
Vol 10 (39) ◽  
pp. 5304-5314 ◽  
Author(s):  
Kazuya Maruyama ◽  
Arihiro Kanazawa ◽  
Sadahito Aoshima
Keyword(s):  
Systematic Study ◽  
Ring Opening ◽  
Vinyl Monomers ◽  
Structural Effects ◽  
Vinyl Ethers ◽  
Cyclic Acetals ◽  
Cationic Copolymerization

The effects of the structures of cyclic acetals on the copolymerization behavior were systematically investigated in the cationic copolymerization with vinyl ethers.

ChemInform Abstract: Catalytic Synthesis of Homoallyloxyalcohols and 1,2-Bis(homoallyloxy)ethanes Through Ring-Opening Allylation of Cyclic Acetals with Allylsilanes over Solid Acids.

ChemInform ◽  
2011 ◽  
Vol 42 (39) ◽  
pp. no-no
Author(s):  
Ken Motokura ◽  
Hirokazu Yoneda ◽  
Akimitsu Miyaji ◽  
Yasuharu Sakamoto ◽  
Toshihide Baba
Keyword(s):  
Ring Opening ◽  
Solid Acids ◽  
Catalytic Synthesis ◽  
Cyclic Acetals

ChemInform Abstract: RING-OPENING REACTION OF SOME CYCLIC ACETALS

1974 ◽  
Vol 5 (13) ◽  
pp. no-no
Author(s):  
Y. OKUDA ◽  
T. MORIMOTO ◽  
Y. FUJITA
Keyword(s):  
Ring Opening ◽  
Cyclic Acetals ◽  
Ring Opening Reaction
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