Electrochemical and chemical oxidation of alcohols in a two-phase system using N-oxopiperidinium salt: Synthesis of 4-chlorobutanal, formylcyclopropanes, andm-phenoxybenzaldehyde
摘要:
Oxidation of 4-chlorobutanol-1, cyclopropylcarbinols, and m-phenoxybenzyl alcohol with electrogenerated bromine, molecular bromine, and sodium hypochlorite using N-oxopiperidinium salt in the two-phase system CH2Cl2-water gave the corresponding carbonyl compounds with good yields.
An amidine compound represented by formula (1)
wherein R
1
, R
2
, R
3
, R
4
and R
5
are the same or different and represent a C1 to C5 alkyl group optionally having one or more halogen atoms or the like; R
6
and R
7
are a hydrogen atom or the like; R
8
and R
9
are the same or different and represent a C1 to C3 alkyl group optionally having one or more halogen atoms or the like; and R
10
and R
11
are the same or different and represent a C1 to C6 alkyl group optionally having one or more halogen atoms or the like,
has an excellent control effect on plant diseases.
Sequential and highly stereoselective intermolecular radical additions of 2,3-cis-disubstituted 1,1-dibromo- and 1-bromocyclopropanes to electron-deficient olefins
作者:Yoo Tanabe、Ken-ichi Wakimura、Yoshinori Nishii
DOI:10.1016/0040-4039(96)00156-6
日期:1996.3
Novel and sequential intermolecular radicaladditions of 2,3-cis-disubstituted 1,1-dibromo- and 1-bromocyclopropanes to electron-deficient olefins proceeded with high stereoselectivity, i.e., in an exo-face addition manner. This highly stereoselectiveaddition was also applied to an intramolecular cyclization.
An amidine compound represented by formula (1)
wherein R1, R2, R3, R4 and R5 are the same or different and represent a C1 to C5 alkyl group optionally having one or more halogen atoms or the like; R6 and R7 are a hydrogen atom or the like; R8 and R9 are the same or different and represent a C1 to C3 alkyl group optionally having one or more halogen atoms or the like; and R10 and R11 are the same or different and represent a C1 to C6 alkyl group optionally having one or more halogen atoms or the like,
has an excellent control effect on plant diseases.
Khusid, A. Kh.; Sorokina, N. Yu., Journal of Organic Chemistry USSR (English Translation), 1983, vol. 19, p. 235 - 237
作者:Khusid, A. Kh.、Sorokina, N. Yu.
DOI:——
日期:——
Intramolecular Trapping of Esters by 1-Lithio-1-bromocyclopropanes
作者:Mark S. Baird、Florian A.M. Huber、Viacheslav V. Tverezovsky、Ivan G. Bolesov
DOI:10.1016/s0040-4020(00)00385-9
日期:2000.6
Reaction of 2-acyloxymethyl-1,1-dibromocyclopropanes with methyllithium at -90 degrees C leads to selective bromine-lithium exchange and intramolecular cyclisation to give a 1-bromo-3-oxabicyclo[3.1.0]hexan-2-ol. (C) 2000 Elsevier Science Ltd. All rights reserved.