The Hantzsch dihydropyridine synthesis is found to benefit from.

Dermal, respiratory tract, and systemic sensitization 9.2.4.1 Mucosal effects 9.2.4.2 Skin effects 9.2.4.3 Respiratory tract sensitization 9.2.4.4 Systemic sensitization 9.2.4.4.1 Allergic reaction following the dental use of paraformaldehyde

The Hantzsch dihydropyridine synthesis is found to benefit from .

The Knoevenagel-Fries modification allows forthe synthesis of unsymmetrical pyridine compounds.

A conventient one-step synthesis of spirodihydropyridines

In the case of specially sensitive groups that showhypersensitivity reactions without immunological signs, formaldehydeconcentrations should be kept to a minimum and should not exceed0.01 mg/m3.

The Hantzsch dihydropyridine synthesis is found to benefit from .

Patch tests performed with formaldehyde challenge concentrations of< 1% formaldehyde resulted in positive reactions in about 2% of allpatch-tested patients throughout the world.


Pyridine synthesis - Organic chemistry

Patch tests performed with formaldehyde challenge concentrations of1% or less resulted in positive reactions in about 2% of all patientstested throughout the world; higher formaldehyde challenge concen-trations may be irritant (Anon., 1987).

Bohlmann-Rahtz Pyridine Synthesis

Formaldehyde solution is a primary skin-sensitizing agent inducingallergic contact dermatitis (Type IV, T-cell mediated delayed hypersen-sitivity reaction); it may induce immunological contact urticaria(Type I, perhaps IgE mediated, immediate hypersensitivity reaction).

Hantzsch pyrrole synthesis - Wikipedia

Marzulli & Maibach (1973) reported that one of 5 sen-sitized volunteers reacted, under controlled conditions, to a challengeconcentration of 0.01% formaldehyde.

The Hantzsch Pyrrole Synthesis, named for Arthur Rudolf Hantzsch, ..

Patch-test studies with differentconcentrations of formaldehyde have shown that concentrations below0.05% rarely elicit an allergic reaction, even in sensitive individuals(Schulz, 1983).

Mechanism of the initial reaction of formaldehydewith DNA.

9.2.4.4.1 Allergic reaction following the dental use of paraformaldehyde Adverse reactions have been reported following the use of rootcanal filling materials containing paraformaldehyde.

Hantzsch Dihydropyridine (Pyridine) Synthesis

9.2.4.4 Systemic sensitization A case report has been described involving an anaphylactic shockreaction after accidental iv application of formaldehyde duringhaemodialysis treatment due to formaldehyde remaining in the equipmentafter disinfection.

Kröhnke pyridine synthesis - Wikipedia

Allergic reactions to cosmetics containing formaldehyde as a pre-servative, especially shampoos, are unusual (Eckardt, 1966) and appearmostly among those who have been sensitized by occupational exposure.