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TCI offers a wide selection of fine and specialty chemicals by drawing upon expert manufacturing techniques. With an extensive catalog of 28,000 high quality organic reagents suitable for benchtop-to-bulk chemistry, this issue features high-quality TCI cyclic alkyl amino carbene precursors, sulfur dioxide surrogate reagents, acid-catalyzed carbonyl-olefin metathesis, heterocyclic building blocks, and more.
CAAC (Cyclic Alkyl Amino Carbene) Precursor

Cyclic Alkyl Amino Carbene (CAAC) Precursor

Developed as an alternative to N-Heterocyclic carbenes (NHCs) and behaving as a strong σ donor, Cyclic alkyl amino carbenes (CAACs) are NHC analogs with an electron-rich carbon atom substituting a nitrogen atom. CAACs are also excellent ligands for transition metal complexes as well as typical metals and boron compounds. With unique reactivity of these complexes reported, TCI offers Cyclohexyl-CAAC [D5596] as a CAAC precursor.
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Sulfur Dioxide (SO2) Surrogate Reagents

Sulfur Dioxide (SO2) Surrogate Reagents

Used in organic synthesis as both a reagent and solvent, Sulfur dioxide (SO2) though gaseous, is highly toxic and more costly to use. Labs looking for SO2 surrogate reagents turn to TCI for DABSO [B3960] and Potassium Disulfite [P2480] (both solids), and TIMSO [U0113] (liquid). An example of using DABSO [B3960] as an alternative SO2 source, includes using the copper-catalyzed direct sulfonylative-Suzuki coupling of aryl boronic acids with electrophiles. Furthermore, it has been reported that the reactions using these reagents affords sulfones, sulfonylfluorides, sulfonamides, sulfinates and sulfoxides.
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Interrupted Carbonyl-Olefin Metathesis Via Oxygen Atom Transfer

Interrupted Carbonyl-Olefin Metathesis via Oxygen Atom Transfer

The Schindler Group recently discovered an additional mechanistic pathway involving a key oxetane intermediate through the synthesis of a variety of tetrahydrofluorenes. The synthesis of tetrahydrofluorenes via this method employs triflic acid [T0751] as the acid catalyst and features a broad substrate scope varying from good to excellent yield. The aromatic moiety is tolerant to strongly electron donating, electron withdrawing, and heteroaromatic (e.g. thiophene) groups.
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C3430
D5574
A3231

New Products for Heterocyclic Building Blocks

The basic components for organic synthesis, TCI offers a market-leading building blocks including functionalized heterocycles, carbonyl compounds, halogenated compounds, fluorinated compounds and more. Above are 3 new heterocyclic building blocks for your research.
See Our Heterocyclic Building Blocks

Upcoming Events

The 13th International Conference on Cutting-Edge Organic Chemistry in Asia (ICCEOCA-13)
November 1-4, 2018
Chulabhorn Convention Center, Chulabhorn Research Institute, Bangkok, Thailand

 

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