A new entry to the ethynylation of azaaromatics using bis(tributylstannyl)acetylene in the presence of alkyl chloroformate

On the regioselectivity of the reaction of N-methoxycarbonylpyridinium chloride with Grignard reagents: highly regioselective synthesis of 2-substituted N-methoxycarbonyl-1,2-dihydropyridines.

Ryohei Yamaguchi, Yutaka Nakazono, Mituyosi Kawanisi · Tetrahedron Letters · 1983 · 93 citations

Natural Sciences, Chemistry, Organic Chemistry +5

Reaction of allylic tin reagents with nitrogen heteroaromatics activated by alkyl chloroformates: regioselective synthesis of .alpha.-allylated 1,2-dihydropyridines and change of the regioselectivity depending on methyl substituents at the allylic moiety

Ryohei Yamaguchi, Masataka Moriyasu, Michihiko Yoshioka et al. · The Journal of Organic Chemistry · 1988 · 79 citations

Natural Sciences, Chemistry, Catalysis +7

Highly Regioselective α-Addition of Alkynyl and Alkenyl Grignard Reagents to 1-Alkoxycarbonylpyridinium Salts and Its Application to Synthesis of 1-Azabicycloalkanes and (±)-Solenopsin A

Ryohei Yamaguchi, Yutaka Nakazono, Toshitsugu Matsuki et al. · Bulletin of the Chemical Society of Japan · 1987 · 70 citations · Full text

Natural Sciences, Chemistry, Medicinal Chemistry +16

Highly regioselective .alpha.-allylation of N-(alkoxycarbonyl)pyridinium salts by means of allyltin reagents

Ryohei Yamaguchi, Masataka Moriyasu, Michihiko Yoshioka et al. · The Journal of Organic Chemistry · 1985 · 58 citations

Natural Sciences, Chemistry, Catalysis +5

An efficient regio- and stereoselective synthesis of (.+-.)-monomorine I via the highly regioselective .alpha.-alkynylation of a 1-acylpyridinium salt

Ryohei Yamaguchi, E. HATA, Toshitsugu Matsuki et al. · The Journal of Organic Chemistry · 1987 · 53 citations

Natural Sciences, Chemistry, Medicinal Chemistry +8