CC BY-NC-ND 4.0 · SynOpen 2022; 06(04): 263-269
DOI: 10.1055/s-0042-1751374
paper

Zn/ZnBr2 Catalysed Reaction of Aldehydes with Allylbromide: Synthesis of 2,6-Disubstituted 4-Bromotetrahydropyrans

D. O. Biradar
a   Organic Synthesis Laboratory, Fluoro-Agrochemicals Department, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, Telangana, India
,
Y. D. Mane
b   BSS Arts, Science & Commerce College, Makni Tq, Lohara-413604, Osmanabad, MS, India
,
Y. P. Sarnikar
c   Dayanand Science College, Latur-413512, MS, India
,
S. G. Kulkarni
d   Maharastra Mahavidyalaya, Nilanga-413521, MS, India
,
B. V. Subba Reddy
a   Organic Synthesis Laboratory, Fluoro-Agrochemicals Department, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, Telangana, India
,
a   Organic Synthesis Laboratory, Fluoro-Agrochemicals Department, CSIR-Indian Institute of Chemical Technology, Hyderabad-500007, Telangana, India
› Author Affiliations


Abstract

An efficient approach for the one-pot synthesis of 4-bromotetrahydropyrans in a highly diastereoselective manner via the alkynylation followed by Prins cyclisation is described. The method employs aldehydes and allyl bromide as reactants, with a Zn/ZnBr2 catalytic system in CH2Cl2. A variety of 2,6-disubstituted 4-bromotetrahydropyran derivatives were obtained in good yields.

Supporting Information



Publication History

Received: 29 June 2022

Accepted after revision: 20 September 2022

Article published online:
19 October 2022

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