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27.1.4 Product Subclass 4: Cyclic Conjugated Sulfoxonium Ylides (1λ4-Thiopyran 1-Oxides)

DOI: 10.1055/sos-SD-027-00002

Aggarwal, V.; Richardson, J.Science of Synthesis, (20042793.

1λ4-Thiopyran 1-oxides 232 are cyclic conjugated ylides that are related to sulfoxonium ylides (Scheme 111). They are nonaromatic[‌272‌‌274‌] and X-ray crystal structures show that their carbon atoms are planar, with the sulfoxide moiety bent out of the plane made by the carbon atoms.[‌273‌,‌275‌]

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