The need to reduce the accumulation of CO2 into the atmosphere requires new technologies able to reduce the CO2 emission. The utilization of CO2 as a building block may represent an interesting approach to synthetic methodologies less intensive in carbon and energy. In this paper the general properties of carbon dioxide and its interaction with metal centres is first considered. The potential of carbon dioxide as a raw material in the synthesis of chemicals such as carboxylates, carbonates, carbamates is then discussed. The utilization of CO2 as source of carbon for the synthesis of fuels or other C1 molecules such as formic acid and methanol is also described and the conditions for its implementation are outlined. A comparison of chemical and biotechnological conversion routes of CO2 is made and the barriers to their exploitation are highlighted.

Utilisation of CO2 as a chemical feedstock: opportunities and challenges

Solid catalysts provide numerous opportunities for
recovering and recycling catalysts from reaction
environments. These features can lead to improved
processing steps, better process economics, and environmentally
friendly industrial manufacturing.
Thus, the motivating factors for creating recoverable
catalysts are large.

Design and Preparation of Organic−Inorganic Hybrid Catalysts

In 1893, P. Biginelli reported the synthesis of functionalized 3, 4-dihydropyrimidin-2(1H)-ones (DHPMs) via three-component condensation reaction of an aromatic aldehyde, urea, and ethyl acetoacetate. In the past decade, this long-neglected multicomponent reaction has experienced a remarkable revival, mainly due to the interesting pharmacological properties associated with this dihydropyrimidine scaffold. In this Account, we highlight recent developments in the Biginelli reaction in areas such as solid-phase synthesis, combinatorial chemistry, and natural product synthesis.

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Recent advances in the Biginelli dihydropyrimidine synthesis. New tricks from an old dog.

Coumarins in polymers: From light harvesting to photo-cross-linkable tissue scaffolds

6.1. Oxadiazoles 4154 6.2. Diazaphospholes 4154 7. Six-Membered Heterocycles with One Heteroatom 4155 7.1. Pyridines 4155 7.2. Pyridinones 4155 7.3. Quinolines 4156 7.4. Quinolinones 4157 7.5. Isoquinolines 4157 7.6. Acridines 4158 7.7. Pyranones 4158 7.8. Flavones 4159 8. Six-Membered Heterocycles with Two Heteroatoms 4159 8.1. Pyridazinones 4159 8.2. Pyrimidines 4159 8.3. Pyrimidinones 4160 8.4. Quinazolines 4162 8.5. Quinazolinones 4162 8.6. Quinoxalines 4164 8.7. Quinoxalinediones 4165 8.8. Oxazines 4165 8.9. Oxazinones 4166 8.10. Thiazines 4166 9. Six-Membered Heterocycles with Three Heteroatoms 4166

Solvent-free heterocyclic synthesis.

The invention relates to a compound of Formula (I), wherein n is 0 or 1,R 1 is H or CH 3 and R 2 is a linear (C 3 -C 6 )alkyl and an insecticide composition comprising at least one insecticide active ingredient and at least one a compound of Formula (I).

Substituted 2,3-dihydrobenzofurans and their use as synergists

Alcohols and phenols were efficiently acylated with acetic anhydride without solvent over zeolite HSZ-360. The catalyst can be reused with no activity loss.

Zeolite HSZ‐360 as a New Reusable Catalyst for the Direct Acetylation of Alcohols and Phenols under Solventless Conditions.

The Cu-Na-HSZ-320 zeolite can be utilised as an efficient and reusable catalyst in the allylic oxidation of olefins with tert -butyl perbenzoate to give the corresponding allylic esters in good yield and excellent selectivity.

Allylic Oxidation of Olefins in the Presence of Cu‐Na‐HSZ‐320 Zeolite as Reusable Solid Catalyst.

Zeolite-Induced Heterodomino Reaction. Regioselective Synthesis of 2H-1-Benzopyrans from Phenols and α-Alkynols.

Phenols and alcohols are tetrahydropyranylated in the presence of zeolites HSZ in good to excellent yields and selectivities. Addition of methanol performs the complete deprotection.

Silvia Carloni

Papers

Substituted 2,3-dihydrobenzofurans and their use as synergists

Zeolite HSZ‐360 as a New Reusable Catalyst for the Direct Acetylation of Alcohols and Phenols under Solventless Conditions.

Allylic Oxidation of Olefins in the Presence of Cu‐Na‐HSZ‐320 Zeolite as Reusable Solid Catalyst.

Zeolite-Induced Heterodomino Reaction. Regioselective Synthesis of 2H-1-Benzopyrans from Phenols and α-Alkynols.

Solvent Free Tetrahydropyranylation of Phenols and Alcohols over Zeolites HSZ as Reusable Catalysts.